Jump to:

→ Top
→ Refereed
→ Proceedings
→ Abstracts
→ Chapters
→ Gen. public

↩ Main page

Joni Tammi – List of Publications


[N.B.: Articles published before mid-2006 are under the name J.J.P. Virtanen.]

Summary

Updated: June 2023

  • 71 articles in refereed journals
  • 22 conference proceedings
  • 6 other scientific or technical publications
  • 19 popularized or magazine articles, book reviews

    • International peer-reviewed journals

    71. 2023
    Time variability of the core-shift effect in the blazar 3C 454.3
    Chamani, Wara; Savolainen, Tuomas; Ros, Eduardo; Kovalev, Yuri Y.; Wiik, Kaj; Lähteenmäki, Anne;Tornikoski, Merja; Tammi, Joni
    The Astrophysical Journal, 943, 157
    ADS, arXiv:2209.13301
    70. 2023
    Radio and Gamma-Ray Variability in Blazar S5 0716+714: A Year-like Quasi-periodic Oscillation in the Radio Light Curve
    Li, Xiao-Pan; Cai, Yan; Yang, Hai-Yan; Lähteenmäki, Anne; Tornikoski, Merja; Tammi, Joni; Suutarinen, Sofia; Yang, Hai-Tao; Luo, Yu-Hui; Wang, Li-Sha
    The Astrophysical Journal, 943, 157
    ADS,
    69. 2023
    Quasi-periodic behaviour in the radio and ?-ray light curves of blazar PKS 1510-089
    Li, Xiao-Pan; Cai, Yan; Yang, Hai-Yan; Lähteenmäki, Anne; Tornikoski, Merja; Tammi, Joni; Suutarinen, Sofia; Yang, Hai-Tao; Luo, Yu-Hui; Wang, Li-Sha
    Monthly Notices of the Royal Astronomical Society, 519, 4893
    ADS,
    68. 2022
    Kinematics of Parsec-Scale Jets of Gamma-Ray Bright Blazars at 43 GHz during Ten Years of the VLBA-BU-BLAZAR Program
    Weaver, Zachary R.; Jorstad, Svetlana G.; Marscher, Alan P.; Morozova, Daria A.; Troitsky, Ivan S.; Agudo, Iván; Gómez, José L.; Lähteenmäki, Anne; Tammi, Joni; Tornikoski, Merja
    Astrophysical Journal Supplement Series, 260, 12
    ADS, arXiv:2202.12290
    67. 2022
    Multiwavelength variability power spectrum analysis of the blazars 3C 279 and PKS 1510-089 on multiple timescales
    Goyal, Arti; Soida, Marian; Stawarz, Lukasz; Wiita, Paul J.; Nilsson, Kari; Jorstad, Svetlana; Marscher, Alan P.; Aller, Margo F.; Aller, Hugh D.; Lahteenmaki, Anne; Hovatta, Talvikki; Zola, Staszek; Nalewajko, Krzysztof; Tornikoski, Merja; Tammi, Joni; Hodges, Mark; Kiehlmann, Sebastian; Readhead, Anthony C. S.; Max-Moerbeck, Walter; Lindfors, Elina; Fallah Ramazani, Vandad; Reichart, D. E.; Caton, D. B.; Valverde, Janeth; Horan, Deirdre; Ojha, Roopesh; van Zyl, Pfesesani
    The Astrophysical Journal, 927, 214
    ADS, arXiv:2112.04194
    66. 2022
    Investigating the blazar TXS 0506+056 through sharp multi-wavelength eyes during 2017-2019
    MAGIC Collaboration; ...; Tammi, J.; et al. (216 co-authors)
    The Astrophysical Journal, 927, 197
    ADS, arXiv:2202.02600
    65. 2022
    Multiwavelength study of the gravitationally lensed blazar QSO B0218+357 between 2016 and 2020
    Acciari, V. A.; Ansoldi, S.; Antonelli, L. A.; ...; Tammi, J.; et al. (210 co-authors)
    Monthly Notices of the Royal Astronomical Society, 510, 2344
    ADS, arXiv:2111.12926
    64. 2022
    Magnetic field strengths of the synchrotron self-absorption region in the jet of CTA 102 during radio flares
    Kim, Sang-Hyun; Lee, Sang-Sung; Lee, Jee Won; Hodgson, Jeffrey A.; Kang, Sincheol; Algaba, Juan-Carlos; Kim, Jae-Young; Hodges, Mark; Agudo, Ivan; Fuentes, Antonio; Escudero, Juan; Myserlis, Ioannis; Traianou, Efthalia; Lähteenmäki, Anne; Tornikoski, Merja; Tammi, J.; Ramakrishnan, Venkatessh; Järvelä, Emilia
    Monthly Notices of the Royal Astronomical Society, 510, 815
    ADS arXiv:2111.14025
    63. 2021
    Association of IceCube neutrinos with radio sources observed at Owens Valley and Metsähovi Radio Observatories
    Hovatta, T.; Lindfors, E.; Kiehlmann, S.; Max-Moerbeck, W.; Hodges, M.; Liodakis, I.; Lahteenmaki, A.; Pearson, T. J.; Readhead, A. C. S.; Reeves, R. A.; Suutarinen, S.; Tammi, J.; Tornikoski, M.
    Astronomy & Astrophysics, 650, 83
    ADS, arXiv
    62. 2021
    VHE gamma-ray detection of FSRQ QSO B1420+326 and modeling of its enhanced broadband state in 2020
    Acciari, V. A.; Ansoldi, S.; Antonelli, L. A.; ... Tammi, J.; et al. (232 co-authors)
    Astronomy & Astrophysics, 647, A163
    ADS, arXiv
    61. 2020
    Unraveling the complex behavior of Mrk 421 with simultaneous X-ray and VHE observations during an extreme flaring activity in April 2013
    Acciari, V. A.; Ansoldi, S.; Antonelli, L. A.; ... Tammi, J.; et al. (237 co-authors)
    The Astrophysical Journal Supplement Series, 248, 29
    ADS, arXiv
    60. 2020
    Study of the variable broadband emission of Markarian 501 during the most extreme Swift X-ray activity
    Acciari, V. A.; Ansoldi, S.; Antonelli, L. A.; ... Tammi, J. (184 co-authors)
    Astronomy & Astrophysics, 637, A86
    ADS, arXiv
    59. 2020
    The Great Markarian 421 Flare of 2010 February: Multiwavelength Variability and Correlation Studies
    Abeysekara, A. U.; Benbow, W.; Bird, R.; ... Tammi, J.; et al. (257 co-authors)
    The Astrophysical Journal, 890, 97
    ADS, arXiv
    58. 2020
    Solar polarization observations at 3 and 13 mm
    Kallunki, Juha; Tornikoski, Merja; Kirves, Petri; Oinaskallio, Erkki; Aatrokoski, Juha; Mujunen, Ari; Tammi, Joni
    Astronomische Nachricten, 340, 118
    ADS
    57. 2019
    Long-term Variability and Correlation Study of the Blazar 3C 454.3 in the Radio, NIR, and Optical Wavebands
    Sarkar, A.; Chitnis, V. R.; Gupta, A. C.; Gaur, H.; Patel, S. R.; Wiita, P. J.; Volvach, A. E.; Tornikoski, M.; Chamani, W.; Enestam, S.; Lähteenmäki, A.; Tammi, J.; Vera, R. J. C.; Volvach, L. N.
    The Astrophysical Journal, 887, 185
    ADS, arXiv
    56. 2019
    Investigating the multiwavelength behaviour of the flat spectrum radio quasar CTA 102 during 2013-2017
    D'Ammando, F.; Raiteri, C. M.; Villata, M.; ... Tammi, J.; et al. (98 co-authors)
    Monthly Notices of the Royal Astronomical Society, 490, 5300
    ADS, arXiv
    55. 2019
    Flare Activity of Blazar AO 0235+164
    Volvach, A. E.; Volvach, L. N.; Larionov, M. G.; Lähteenmäki, A.; Tornikoski, M.; Tammi, J.; Järvelä, E.; Vera, R. J. C.; Chamani, W.; Enestam, S.
    Cosmic Research, 57, 85
    ADS
    54. 2019
    Cosmological evolution of quasar radio emission in the view of multifractality
    Bewketu Belete, A.; Femmam, Smain; Tornikoski, Merja; Lahteenmaki, Anne; Tammi, Joni; Leao, I. C.; Canto Martins, B. L.; De Medeiros, J. R.
    The Astrophysical Journal, 873, 108
    ADS, arXiv
    53. 2018
    Solar observing system for radio frequencies 5–120 MHz
    J. Kallunki, M. Tornikoski, E. Oinaskallio, P. Kirves, J. Aatrokoski, A. Mujunen, J. Tammi
    Astronomische Nachricten, 339, 656
    ADS
    52. 2018
    Extreme HBL behavior of Markarian 501 during 2012
    Ahnen, M. L.; Ansoldi, S.; Antonelli, L. A.; ... Tammi, J.; et al. (279 co-authors)
    Astronomy & Astrophysics, 620, 181
    ADS, arXiv
    51. 2018
    Detection of persistent VHE gamma-ray emission from PKS 1510-089 by the MAGIC telescopes during low states between 2012 and 2017
    MAGIC Collaboration; Acciari, V.A.; Ansoldi, S.; Antonelli, L. A.; ... Tammi, J.; et al. (171 co-authors)
    Astronomy & Astrophysics, 619, 159
    ADS, arXiv
    50. 2018
    The broad-band properties of the intermediate synchrotron peaked BL Lac S2 0109+22 from radio to VHE gamma-rays
    MAGIC Collaboration; Ansoldi, S.; Antonelli, L. A.; Arcaro, C.; ... Tammi, J.; et al. (165 co-authors)
    Monthly Notices of the Royal Astronomical Society, 480, 879
    ADS, arXiv
    49. 2018
    Characteristics of the Flare Phenomenon in Blazar AO0235+164 in Gamma, Optical, and Radio Bands
    Bychkova, V. S.; Volvach, A. E.; Volvach, L. N.; Kardashev, N. S.; Larionov, M. G.; Vlasyuk, V. V.; Spiridonova, O. I.; Lähteenmäki, A.; Tornikoski, M.; Tammi, J.; Järvelä, E.; Vera, R. J. C.; Chamani, W.; Enestam, S.
    Astrophysical Bulletin, 73, 293
    ADS
    48. 2018
    Radio jets and gamma-ray emission in radio-silent narrow-line Seyfert 1 galaxies
    Lähteenmäki, A.; Järvelä, E.; Ramakrishnan, V.; Tornikoski, M.; Tammi, J.; Vera, R. J. C.; Chamani, W.
    Astronomy & Astrophysics, 614, 1L
    ADS, arXiv
    47. 2018
    Far-infrared photometry of OJ 287 with the Herschel Space Observatory
    Kidger, Mark; Zola, Staszek; Valtonen, Mauri; Lähteenmäki, Anne; Järvelä, Emilia; Tornikoski, Merja; Tammi, Joni; Liakos, Alexis; Poyner, Gary
    Astronomy & Astrophysics, 610, A74
    ADS, Pub.
    46. 2018
    Forty years of solar radio observations at Metsähovi Radio Observatory
    Kallunki, J.; Tornikoski, M.; Tammi, J.; Kinnunen, E.; Korhonen, K.; Kesäläinen, S.; Arkko, O.
    Astronomische Nachrichten, 339, 204
    ADS, Pub.
    45. 2017
    Blazar spectral variability as explained by a twisting inhomogeneous jet
    C. M. Raiteri, M. Villata1, J. A. Acosta-Pulido, ..., J. Tammi, et al.
    Nature, 552, 374
    ADS, Pub.
    44. 2017
    Kinematics of Parsec-Scale Jets of Gamma-Ray Blazars at 43 GHZ Within the VLBA-BU-BLAZAR program
    S.G. Jorstad, A.P. Marscher, D.A. Morozova, I.S. Troitsky, I. Agudo, C. Casadio, A. Foord, J.L. Gómez, N.R. MacDonald, S.N. Molina, A. Lähteenmäki, J. Tammi, and M. Tornikoski
    The Astrophysical Journal, 846, 98
    ADS, arXiv:1711.03983
    43. 2017
    Simultaneous spectra and radio properties of BL Lacs
    Mingaliev M.; Sotnikova Yu.; Mufakharov T.; Nieppola E.; Tornikoski M.; Tammi J.; Lahteenmaki A.; Udovitskiy R.; Erkenov A.
    Astronomische Nachrichten, 338, 700
    ADS, arXiv:1707.07949
    42. 2017
    37 GHz observations of narrow-line Seyfert 1 galaxies
    Lähteenmäki A.; Järvelä E.; Hovatta T.; Tornikoski M.; Harrison D. L.; López-Caniego M.; Max-Moerbeck W.; Mingaliev M.; Pearson T.J.; Ramakrishnan V.; Readhead A.C.S.; Reeves R.A.; Richards J.L.; SotnikovaY.; Tammi J.
    Astronomy & Astrophysics, 603, A100
    ADS
    41. 2016
    Planck intermediate results. XLV. Radio spectra of northern extragalactic radio sources
    Planck Collaboration; Ade P., Aghanim N., Aller H., ... Tammi J., et al. (186 co-authors)
    Astronomy & Astrophysics, 596, A106
    ADS, arXiv:1606.05120
    40. 2016
    Insights into the emission of the blazar 1ES 1011+496 through unprecedented broadband observations during 2011 and 2012
    Aleksić J., Ansoldi S., Antonelli L.A., ... Tammi J., et al. (164 co-authors)
    Astronomy & Astrophysics, 591, A10
    ADS, arXiv:1603.06776
    39. 2016
    Multiwavelength Study of Quiescent States of Mrk 421 with Unprecedented Hard X-Ray Coverage Provided by NuSTAR in 2013
    Baloković M., Paneque D., Madejski G, ... Tammi J., et al. (309 co-authors)
    The Astrophysical Journal, 819, 156
    ADS, arXiv:1512.02235
    38. 2015
    The WEBT campaign on the BL Lac object PG 1553+113 in 2013. An analysis of the enigmatic synchrotron emission
    C.M. Raiteri, A. Stamerra, M. Villata, ... Tammi J., et al. (62 co-authors)
    Monthly Notices of the Royal Astronomical Society, 454, 353
    ADS, arXiv:1509.04936
    37. 2015
    First NuSTAR Observations of Mrk 501 within a Radio to TeV Multi-Instrument Campaign
    A. Furniss, K. Noda, S. Boggs, ... Tammi J., et al. (275 co-authors)
    The Astrophysical Journal, 812, 65
    ADS, arXiv:1509.04936
    36. 2015
    The 2009 multiwavelength campaign on Mrk 421: Variability and correlation studies
    Aleksic J., Ansoldi S., Antonelli L. A., ... Tammi J., et al. (274 co-authors)
    Astronomy & Astrophysics, 576, A126
    ADS, arXiv:1502.02650
    35. 2015
    Properties of flat-spectrum radio-loud Narrow-Line Seyfert 1 Galaxies
    L. Foschini, M. Berton, A. Caccianiga, S. Ciroi, V. Cracco, B.M. Peterson , E. Angelakis, V. Braito, L. Fuhrmann, L. Gallo, D. Grupe, E. Järvelä, S. Kaufmann, S. Komossa, Y.Y. Kovalev, A. Lähteenmäki, M.M. Lisakov, M.L. Lister, S. Mathur, J.L. Richards, P. Romano, A. Sievers, G. Tagliaferri, J. Tammi, O. Tibolla, M. Tornikoski, S. Vercellone, G. La Mura, L. Maraschi, P. Rafanelli
    Astronomy & Astrophysics, 575, A13
    Corrigendum: Astronomy & Astrophysics, 603, C1
    ADS (orig.), ADS (corr.), arXiv:1409.3716F
    34. 2014
    The connection between the parsec-scale radio jet and gamma-ray flares in the blazar 1156+295
    V. Ramakrishnan, J. Lé-Tavares, E.A. Rastorgueva-Foi, ... J. Tammi, et al. (33 co-authors)
    Monthly Notices of the Royal Astronomical Society, 445, 1636
    ADS, arXiv:1409.2542
    33. 2014
    MAGIC gamma-ray and multifrequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012
    The MAGIC Collaboration; J. Aleksić, S. Ansoldi, L.A. Antonelli, ... J. Tammi, et al. (220 co-authors)
    Astronomy & Astrophysics, 569, A46
    ADS, arXiv:1401.5646
    32. 2014
    The Outburst of the Blazar S40954+658 in March-April 2011
    Morozova D.A., Larionov V.M., Troitsky I.S., Jorstad S.G., Marscher A.P., Gómez J.L., Blinov D. A., Efimova N.V., Hagen-Thorn V.A., Hagen-Thorn E.I., Joshi M., Konstantinova T.S., Kopatskaya E.N., Larionova L.V., Larionova E.G., Lähteenmäki A., Tammi J., Rastorgueva-Foi E., McHardy I., Tornikoski M., Agudo I., Casadio C., Molina S.N., Volvach A.E., Volvach L.N.
    The Astrophysical Journal, 148, 9
    ADS, arXiv:1406.2286
    31. 2014
    MAGIC observations and multifrequency properties of the Flat Spectrum Radio Quasar 3C 279 in 2011
    The MAGIC Collaboration; J. Aleksić, S. Ansoldi, L.A. Antonelli, ... J. Tammi, et al. (175 co-authors)
    Astronomy & Astrophysics, 567, A41
    ADS, arXiv:1311.2833
    30. 2014
    Long-term, multi-frequency monitoring of the blazar S0528+134
    A.E. Vol'vach, A.M. Kutkin, M.G. Larionov, L.N. Vol'vach, A. Lähteenmäki, M. Tornikoski, J. Tammi, P. Savolainen, M.F. Aller, H.D. Aller, M. Sasada
    Astronomy Reports, 58, 71
    ADS   Article
    29. 2013
    Introducing the CTA concept
    B.S. Acharya, M. Actis, T. Aghajani, ... J. Tammi, et al. (CTA collaboration, 977 co-authors)
    Astroparticle Physics, 43, 3
    ADS   Article
    28. 2013
    Radio to gamma-ray variability study of blazar S5 0716+714
    B. Rani, T.P. Krichbaum, L. Fuhrmann, M. Böttcher, B. Lott, H.D. Aller, M.F. Aller, E. Angelakis, U.Bach, D. Bastieri, A.D. Falcone, Y. Fukazawa, K.E. Gabanyi, A.C. Gupta, M. Gurwell, R. Itoh, K.S. Kawabata, M. Krips, A.A. Lähteenmäki, X. Liu, N. Marchili, W. Max-Moerbeck1, I. Nestoras, E. Nieppola, G. Quintana-Lacaci, A.C.S. Readhead, J.L. Richards, M. Sasada, A. Sievers, K. Sokolovsky, M. Stroh, J. Tammi, M. Tornikoski, M. Uemura, H. Ungerechts, T. Urano, and J.A. Zensus
    Astronomy & Astrophysics, 522, A11
    ADS, arXiv:1301.7087
    27. 2013
    A prolonged flare in the blazar 3C 454.3
    A.E. Vol'vach, A.M. Kutkin, M.G. Larionov, L.N. Vol'vach, A. Lähteenmäki, M. Tornikoski, J. Tammi, J. Léon-Tavares, E. Järvelä, M.F. Aller, H.D. Aller
    Astronomy Reports, 57, 46
    ADS   Article
    26. 2013
    Results of long-term monitoring of 3C 273 over a wide range of wavelengths
    A.E. Vol'vach, A.M. Kutkin, L.N. Vol'vach, M.G. Larionov, A. Lähteenmäki, M. Tornikoski, E. Nieppola, J. Tammi, P. Savolainen, J. Léeon-Tavares, M.F. Aller, H.D. Aller
    Astronomy Reports, 57, 34
    ADS   Article
    25. 2012
    Radio-to-gamma-ray monitoring of the narrow-line Seyfert 1 galaxy PMN J0948+0022 from 2008 to 2011
    L. Foschini, E. Angelakis, L. Fuhrmann, G. Ghisellini, T. Hovatta, A. Lähteenmäki, M. L. Lister, V. Braito, L. Gallo, T. S. Hamilton, M. Kino, S. Komossa, A. B. Pushkarev , D. J. Thompson, O. Tibolla, A. Tramacere, A. Carraminana, L. Carrasco, A. Falcone, M. Giroletti, D. Grupe, T. P. Krichbaum, W. Max-Moerbeck, I. Nestoras, T. J. Pearson, A. Porras, A. C. S. Readhead, E. Recillas, J. L. Richards, D. Riquelme, R. Schmidt, A. Sievers, J. Tammi, M. Tornikoski, H. Ungerechts, J. A. Zensus, A. Celotti, G. Bonnoli, A. Doi, L. Maraschi, G. Tagliaferri, F. Tavecchio
    Astronomy & Astrophysics, 548, A106
    ADS   Article   arXiv:1209.5867
    24. 2014
    Variability of the blazar 4C 38.41 (1633+382) from GHz frequencies to GeV energies
    Raiteri C.M., Villata M., Smith P.S., ... Tammi J., et al. (77 co-authors)
    Astronomy & Astrophysics, 545, A48
    ADS   arXiv:1207.3979
    23. 2012
    Discovery of VHE gamma-rays from the blazar 1ES 1215+303 with the MAGIC Telescopes and simultaneous multi-wavelength observations
    MAGIC Collaboration: J. Aleksić, E.A. Alvarez, L.A. Antonelli, ... J. Tammi, et al. (165 co-authors)
    Astronomy & Astrophysics, 544, A142
    ADS   arXiv:1203.0490
    22. 2012
    The structure and emission model of the relativistic jet in the quasar 3C 279 inferred from radio to high-energy gamma-ray observations in 2008–2010
    Hayashida M., Madejski G.M., Nalewajko K., ... Tammi J., et al. (93 co-authors)
    The Astrophysical Journal, 754, 114
    ADS   arXiv:1206.0745
    21. 2012
    Simultaneous Planck, Swift, and Fermi observations of X-ray and gamma-ray selected blazars
    Giommi P., Polenta G., Lähteenmäki A., ... Tammi J., et al. (95 co-authors)
    Astronomy & Astrophysics, 541, A160
    ADS   arXiv:1108.1114
    20. 2012
    AGILE detection of Cygnus X-3 gamma-ray active states during the period mid-2009/mid-2010
    Bulgarelli A., Tavani M., Chen A.W., ... Tammi J., et al. (73 co-authors)
    Astronomy & Astrophysics, 538, 63
    ADS   arXiv:1111.4960
    19. 2011
    Rapid variability of the radio flux density of the blazar J0721+7120 (S5 0716+714) in 2010
    Gorshkov A.G., Ipatov A.V., Konnikova V.K., Lähteenmäki A., Mardyshkin V.V., Mingaliev M.G., Nieppola E., Tammi J., Finkelstein A.M., Kharinov, M.A.
    Astronomy Reports, 55, 1096
    ADS
    18. 2011
    Planck Early Results. XV. Spectral energy distributions and radio continuum spectra of northern extragalactic radio sources
    Aatrokoski J, ... Tammi J., et al. (Planck Collaboration, 247 co-authors)
    Astronomy & Astrophysics, 536, A15
    ADS   Article   arXiv:1101.2047
    17. 2011
    Planck Early Results. XIV. ERCSC Validation and Extreme Radio Sources
    Ade A.R., ... Tammi J., et al. (Planck Collaboration, 215 co-authors)
    Astronomy & Astrophysics, 536, A14
    ADS   Article   arXiv:1101.1721
    16. 2011
    Correlation between Fermi/LAT gamma-ray and 37 Ghz properties of northern AGN averaged over 11 months
    Nieppola E., Tornikoski M., Valtaoja E., León-Tavares J., Hovatta T., Lähteenmäki A. & Tammi J.
    Astronomy & Astrophysics, 535, 69
    ADS   Article   arXiv:1109.5844
    15. 2011
    The long-lasting activity of 3C 454.3. GASP-WEBT and satellite observations in 2008-2010
    Raiteri C.M., Villata M., Aller M.F., ... Tammi J., et al. (72 co-authors)
    Astronomy & Astrophysics, 534, A87
    ADS   Article   arXiv:1107.1093
    14. 2011
    Anomalous flare activity of the blasar 3C 454.3 during 2005-2011
    Vol'vach A., Kutkin A., Vol'vach L., Larionov M., Lähteenmäki, A., Tornikoski, M., Nieppola E., Savolainen P., Tammi J., Aller M., Aller H.
    Astrophysics, 54, 363
    ADS   Article
    13. 2011
    Fermi Large Area Telescope Observations of Markarian 421: The Missing Piece of its Spectral Energy Distribution
    Abdo A. A., Ackermann M., Ajello, M., ... Tammi J., et al. (368 co-authors)
    The Astrophysical Journal, 736, 131
    ADS   Article   arXiv:1106.1348
    12. 2011
    Multi-frequency studies of the non-stationary radiation of the blazar 3C 454.3
    Vol'vach A., Vol'vach L., Kutkin A., Larionov M., Villata M., Raiteri C., Lähteenmäki A., Tornikoski M., Savolainen P., Tammi J., Aller M., Aller H., Sergeev S., Dorochenko V., Efimov Y., Klimanov S., Nazarov S., Borman G., Pushkarev A., Zhdanov V.I, Fedorova E., Vavilova I., Chesnok N.
    Astronomy Reports, 55, 608
    ADS   Article
    11. 2010
    Disk-Jet Connection in AGNs and Microquasars: The Possibility of Thermal Flares in the Centre
    Tammi J. & Hovatta T.
    International Journal of Modern Physics D, Vol 16, Issue 6, Pages 971-976. [Special issue: Proceedings of the "High Energy Phenomena in Relativistic Outflows II" Workshop, Buenos Aires, Argentina, October 2009]
    ADS   Article   arXiv:1002.1243
    10. 2009
    Multiwavelength monitoring of the enigmatic Narrow-Line Seyfert 1 PMN J0948+0022 in March-July 2009
    Abdo A.A., ... Tammi J., et al. (Fermi/LAT Collaboration + 41 co-authors)
    The Astrophysical Journal, 707, 727
    ADS   Article   arXiv:0910.4540v1
    9. 2009
    Particle-acceleration timescales in TeV blazar flares
    Tammi J. & Duffy P.
    Monthly Notices of the Royal Astronomical Society, 393, 1063
    ADS   Article   arXiv:0811.3573
    8. 2008
    Wave transmission and hard particle spectra from parallel shocks
    Tammi J.
    International Journal of Modern Physics D, 17, 1811 [Special issue: Proceedings of the "High Energy Phenomena in Relativistic Outflows" Workshop, Dublin, Ireland, September 2007]
    ADS   Article
    7. 2007
    Synchrotron flaring behaviour of Cygnus X-3 during the February-March 1994 and September 2001 outbursts
    Lindfors E.J., Türler M., Hannikainen D.C., Pooley G., Tammi J., Trushkin S. & Valtaoja E.
    Astronomy & Astrophysics, 473, 923
    ADS   Article   astro-ph/0707.2808
    6. 2006
    Turbulence transmission in parallel relativistic shocks using ray tracing
    Tammi J. & Vainio R.
    Astronomy & Astrophysics, 460, 23
    ADS   Article   astro-ph/0609400
    5. 2005
    Particle acceleration in thick parallel shocks with large compression ratio
    Virtanen J.J.P. & Vainio R.
    Astronomy & Astrophysics, 439, 461
    ADS   Article   astro-ph/0505598
    4. 2005
    Stochastic Acceleration in Relativistic Parallel Shocks
    Virtanen J.J.P. & Vainio R.
    Astrophysical Journal, 621, 313
    ADS   Article   astro-ph/0411184
    3. 2005
    Alfvén-wave transmission and test-particle acceleration in parallel relativistic shocks
    Vainio R., Virtanen J.J.P. & Schlickeiser R.
    Astronomy & Astrophysics, 431, 7
    ADS   Article
    2. 2004
    Twenty years monitoring of extragalactic sources at 22, 37 and 87 GHz
    Teräsranta H., ... Virtanen J., et al. (27 co-authors)
    Astronomy & Astrophysics, 427, 769
    ADS   Article
    1. 2003
    Alfvén-wave transmission and test-particle acceleration in parallel relativistic shocks
    Vainio R., Virtanen J.J.P. & Schlickeiser R.
    Astronomy & Astrophysics, 409, 821
    ADS   Article

    (Back to top)

    Peer-reviewed conference proceedings

    22. 2023
    Satellite Mega-Constellations and Their Impact on Radio Astronomy
    J. Kallunki, P. Kirves, D. McKay, J. Tammi
    talk at the "XXXVI Finnish URSI Convention", Jan 2023, Espoo, Finland
    link
    21. 2023
    Metsähovi Compact Array: a hands-on radio interferometer for science and engineering
    J. Tammi, J. Kallunki, D. McKay
    talk at the "XXXVI Finnish URSI Convention", Jan 2023, Espoo, Finland
    link
    20. 2017
    Multiwavelength survey of a sample of flat-spectrum radio-loud narrow-line Seyfert 1 galaxies
    Foschini L., Berton M., Caccianiga A., ..., Tammi J., et al.
    Proceedings of the Poster presented at HEPRO V (5-8 October 2015, La Plata, Argentina)
    arXiv:1512.00192  
    19. 2017
    Supporting reflective learning with online tools
    P. Kiviluoma, A. Lähteenmäki, J. Tammi
    talk at the "SEFI conference 2016: Engineering Education on Top of the World: Industry University Cooperation", September 2016, Tampere, Finland; proceedings ISBN 978-28735201-44
    Conf.
    18. 2013
    Basic properties of Narrow-Line Seyfert 1 Galaxies with Relativistic Jets
    Foschini L., Angelakis E., Bonnoli G. et al.
    Proceedings of the "X-ray Astronomy: the next 50 years" conference, October 2012, Milano, Italy, vol. 84, p. 731
    arXiv:1301.0756   PDF
    17. 2013
    Bottom-up modelling of active galactic nuclei: Using radio observations to understand gamma-ray flaring in relativistic jets from supermassive black holes
    Tammi J. & Oksman M.
    Proceedings of the "XXXIII Finnish URSI Convention on Radio Science", April 2013, Espoo, Finland
    Conf.   PDF
    16. 2012
    Bottom-up modelling of gamma-ray blazars
    Tammi J.
    Proceedings of "The Extreme and Variable High Energy Sky" workshop, September 2011, Cagliari, Italy, PoS(Extremesky 2011) 055
    Conf.   PDF
    15. 2012
    Bottom-up modelling of gamma-ray blazars
    Tammi J.
    Proceedings of the "Beamed and Unbeamed Gamma-Rays from Galaxies" workshop, April 2011, Muonio, Finland, Journal of Physics: Conference Series, vol. 355 (2012), 012014
    Conf.   PDF
    14. 2011
    Thermal flares from collapsed accretion disks?
    Tammi J.
    Proceedings of the 8th INTEGRAL Workshop "The Restless Gamma-ray Universe", Dublin, Ireland, September 2010; PoS(INTEGRAL 2010)143
    Conf.   PDF
    13. 2011
    Flare-like outbursts from loading of the jets?
    Tammi J.
    Proceedings of the "Steady jets and transient jets – Characteristics and relationships" workshop, Bonn, Germany, April 2010; Memorie della Societa Astronomica Italiana, v.82, p.129 (2011)
    Conf.   PDF
    12. 2010
    Correlations between the Fermi/LAT gamma-ray and 37 GHz radio properties of AGN averaged over 11 months
    Nieppola E., Tornikoski M., Valtaoja E., León-Tavares J., Lähteenmäki A., Hovatta T. & Tammi J.
    Proceedings of the "Fermi meets Jansky – AGN at Radio and Gamma Rays", Bonn, Germany, June 2010; Savolainen, Ros, Porcas & Zensus (Eds.), pp. 89
    Conf.
    11. 2010
    From EGRET to Fermi: mm-radio data and the origin of gamma-ray emission
    Valtaoja E., Tornikoski M., León-Tavares J., Nieppola E., Lähteenmäki A., Tammi J. & Hovatta T.
    Proceedings of the "Fermi meets Jansky – AGN at Radio and Gamma.Rays", Bonn, Germany, June 2010; Savolainen, Ros, Porcas & Zensus (Eds.), pp. 73
    Conf.
    10. 2010
    Connection between jet parameters and black hole masses in quasars
    Hovatta T., Tammi J., Valtaoja E., Tornikoski M., Torrealba J., Chavushyan V., Arshakian T. & Cruz-Gonzalez I.
    Proceedings of the "Accretion and Ejection in AGNs: A Global View", Como, Italy, July 2009; Maraschi L., Ghisellini G., Delle Ceca R. & Tavecchio F. (Eds.), PASP Conf series, 427, 34
    Abstr.   ADS
    9. 2010
    Thermal non-jet flares in active galactic nuclei
    Tammi J. & Hovatta T.
    Proceedings of the "Accretion and Ejection in AGNs: A Global View", Como, Italy, July 2009; Maraschi L., Ghisellini G., Delle Ceca R. & Tavecchio F. (Eds.), PASP Conf series, 427, 118
    Abstr.   ADS
    8. 2008
    Particle-acceleration timescales in TeV blazar flares
    Tammi J. & Duffy P.
    "The 4th Heidelberg International Symposium on High Energy Gamma-Ray Astronomy", Heidelberg, Germany, July 2008; Aharonian F.A., Hofmann W. & Rieger F. (Eds.), AIP Conf. proc. 1085, 475
    Abstr.   Conf.
    7. 2008
    Hard particle spectra from parallel shocks due to turbulence transmission
    Tammi J.
    "The 30th International Cosmic Ray Conference"; R. Caballero et al. (eds.),
    Universidad Nacional Autónoma de México, Mexico City, Mexico, 2008, Vol. 2 (OG part 1), pages 251-254
    Abstr.   PDF
    6. 2008
    Particle acceleration by multiple parallel shocks
    Tammi J. & Dempsey P.
    "The 30th International Cosmic Ray Conference"; R. Caballero et al. (eds.); Universidad Nacional Autónoma de México, Mexico City, Mexico, 2008, Vol. 2 (OG part 1), pages 247-250
    Abstr.   PDF
    5. 2005
    Stochastic Particle Acceleration in Relativistic Parallel Shocks
    Virtanen J.J.P. & Vainio R
    ''Astrophysical sources of high energy particles and radiation'', Torun, Poland, June 2005; eds. T. Bulik, B. Rudak & G. Madejski AIP conf. proc. 801, 410
    Abstr.   Conf.
    4. 2005
    Acceleration of electrons in highly compressed modified shocks
    Virtanen J.J.P. & Vainio R
    ''Astrophysical sources of high energy particles and radiation'', Torun, Poland, June 2005; eds. T. Bulik, B. Rudak & G. Madejski AIP conf. proc. 801, 408
    Abstr.   Conf.
    3. 2005
    Stochastic Particle Acceleration in Relativistic Parallel Shocks
    Virtanen J.J.P. & Vainio R.
    ''The XXII Texas Symposium on Relativistic Astrophysics'', Stanford, California, USA, 2004
    eds P. Chen, E. Bloom, G. Madejski, & V. Petrosian, eConf C041213, 2005
    Abstr.   PDF
    2. 2003
    Monte Carlo Simulations of Electron Acceleration in Parallel Relativistic Shocks
    Virtanen J.J.P. & Vainio, R.
    ''The 28:th International Cosmic Ray Conference'', Tsukuba, Japan, August 2003; IRCR 2003 proceedings, OG 1.4, 2023
    Abstr.   PDF
    1. 2003
    Simulations on the Effect of Internal Structure of Relativistic Shock Fronts on Particle Accereration
    Virtanen J.J.P. & Vainio, R.
    ''High Energy Blazar Astronomy'' workshop, Tuorla, Finland, June 2002; eds. L.O. Takalo, E. Valtaoja, ASP Conf. Proc. Vol. 299, 157
    Abstr.   PDF

    (Back to top)


    Un-refereed conference proceedings

    3. 2016
    Nonlinear synchrotron self-Compton modelling of blazars
    Anjum M. & Tammi J.
    Proceedings of the 4th International Conference on Aerospace Science and Engineering, Islamabad, Pakistan, September 2016
     
    2. 2016
    Broad-band properties of flat-spectrum radio-loud narrow-line Seyfert 1 galaxies
    Foschini L., Berton M., Caccianiga A., ..., Tammi J., et al
    Proceedings 28th Texas Symposium on Relativistic Astrophysics, Geneva, Switzerland, December 2015
    arXiv:1602.08227  
    1. 2003
    Monte Carlo Simulations of Electron Acceleration in Parallel Relativistic Shocks of Finite Width
    Virtanen J.J.P. & Vainio, R.
    ''Particle Acceleration in Astrophysical Objects'' conference, Cracow, Poland, June 2003
    eds. M. Ostrowski, M. Sikora, electronic publication of the Jagiellonian University (Poster)
    Abstr.   PDF

    (Back to top)

    Conferences and meetings with published abstract

    16. 2015
    Metsähovi Compact Array
    J. Tammi
    talk at the "XIII Russian-Finnish Symposium on Radio Astronomy", May 2015, Pulkovo Observatory, St. Petersburg, Russia
    15. 2014
    Developing and teaching a multidisciplinary astronomy course - experiences and insights
    J. Tammi, A. Lähteenmäki
    talk at the "European Week of Astronomy and Space Science - EWASS 2014", July 2014, Geneva, Switzerland
    14. 2014
    Developing and teaching a multidisciplinary astronomy course - experiences and insights
    J. Tammi, A. Lähteenmäki
    talk at the "Astronomers' Days 2014", national meeting of the Finnish Astronomical Society, June 2014, Savonlinna, Finland
    13. 2013
    Numerical modelling of AGN jets using novel C++11 implementation of smoothed-particle magnetohydrodynamics
    Oksman M., Tammi J.
    poster at the "European Week of Astronomy and Space Science - EWASS 2013", July 2013, Turku, Finland
    12. 2013
    Practical astronomy for accountants, photographers and satellite engineers - experiences with a highly-multidisciplinary astronomy course in the Aalto University
    Tammi J., Lähteenmäki A., Rastorgueva-Foi E.
    talk at the "European Week of Astronomy and Space Science - EWASS 2013", July 2013, Turku, Finland
    11. 2012
    J. Tammi
    Synchrotron modelling of gamma-ray AGNs
    talk at the "XII Finnish-Russian Symposium on Radio Astronomy", October 2012, Lammi, Finland
    10. 2012
    Synchrotron modelling of gamma-ray AGNs
    J. Tammi
    poster at the "5th International Symposium on High-Energy Gamma-Ray Astronomy", July 2012, Heidelberg, Germany
    9. 2012
    Transit of Venus
    J. Tammi
    talk at the "Astronomers' Days 2012", national meeting of the Finnish Astronomical Society, June 2012, Porvoo, Finland
    6. 2010
    Particle-acceleration timescales in relativistic jets
    J. Tammi, P. Duffy
    talk at the "22nd European Cosmic Ray Symposium", Turku, Finland, August 3-6 2010
    5. 2010
    Flare activity of the blazar 3C454.3 from gamma to radio wavelength range in 2004, 2010
    Volvach A. E., Larionov M. G., Volvach L. N., Kutkin A. M., Villata, M., Raiteri, C. M., Lahteenmaki, A., Tornikoski, M., Savolainen, P., Tammi, J.,Aller, M. F., Aller, H. D., Sergeev S. G., Dorochenko V. T., Efimov Y. S., Klimanov S. A., Nazarov S. V., Borman G. V., Pushkarev A. B., Zhdanov V. I, Fedorova E. V., Vavilova I. B, Chesnok N. G.
    Abstracts of the X International Gamow School: "Astronomy and beyond: Astrophysics, Cosmo/microphysics, Radio Astronomy and Astrobiology", Odessa, Ukraine, 23-28.8.2010, 35 (2010)
    4. 2010
    Correlations between the Fermi/LAT and 37 GHz bands for Metsähovi AGN
    Nieppola E., Tornikoski M., Valtaoja E., León-Tavares J., Hovatta T., Lähteenmäki A., Tammi J
    talk at the XI Russian-Finnish Radio Astronomy Symposium, Pushchino, Russia, 18-22.10.2010
    3. 2010
    Non-jet flares in AGNs: Signatures from loading of the jet?
    J. Tammi
    poster at the "38th COSPAR Scientific Assembly" held in Bremen, 18-25 July 2010
    2013
    Non-jet flares in AGNs: Signatures from loading of the jet?
    J. Tammi
    talk at the "Astronomers' Days 2010", national meeting of the Finnish Astronomical Society, June 2010, Kangasala, Finland
    2. 2007
    Survivability and performance of cyanobacteria under simulated Martian UV-radiation
    M. Tammi, F. O'Reilly, L. Mibelli, B. Osborne, J. Tammi
    poster at "Seventh European Workshop on Astrobiology", 22-24 October 2007, Turku, Finland
    1. 2015
    Biological Life-Support Systems on Mars
    Tammi M., Lehto K., Kanervo E., Lehto H., Virtanen J.
    poster at "5th European Workshop on Astrobiology", held in Budapest, Hungary, October 2005; International Journal of Astrobiology, 5, pp 67-88

    (Back to top)

    Other scientific publications, chapters in books, etc.

    6. 2022
    Calibration of CALLISTO data
    Kallunki J., Monstein C., Kirves P., Tammi J., Mujunen A.
    Aalto University publication series SCIENCE + TECHNOLOGY, 1/2022, ISBN 978-952-64-0895-1(electronic)
    Link   PDF
    5. 2020
    Oma ala tutuksi
    Tammi J.
    In "LUMA Suomi - Yhdessä olemme enemmän" (Eds. M. Aksela, J. Lundell, & T. Ikävalko), LUMA-keskus Suomi, 2020, ISBN 978-951-51-6647-0
    Link (English)
    4. 2016
    GPS Time Disruptions on 26-Jan-2016
    Mujunen A., Aatrokoski J., Tornikoski M., Tammi J.
    Aalto University publication series SCIENCE + TECHNOLOGY, 2/2016, ISBN 978-952-60-6703-2 (electronic)
    Link   PDF
    3. 2015
    Hyvä yliopisto-opettajuus – kysymyksiä ja vastauksia yliopistopedagogisen koulutusvuoden varrelta (Good university teachership – questions and answers from a year of university-pedagogical training)
    M. Syrjäkari (Ed.), J. Koponen (Ed.), J. Tuominen (Ed.), T. Kiesi, S. Kyösola, K. Nikoskinen, A. Ojapelto, S. Riihiaho, E. Sistonen, F. Tuomisto, P. Ahonen-Rainio, E. Kähkönen, E. Mäki, K. Palomäki, J. Partanen, J. Parviainen, J. Tammi
    Aalto-yliopiston julkaisusarja CROSSOVER, 11/2015, ISBN 978-952-60-6488-8 (electronic)
    Link   PDF
    2. 2007
    Photosynthetic life support systems in the Martian conditions
    Lehto K., Kanervo E., Stâhle K., Lehto H., Tammi M. & Virtanen J.J.P.
    In "ROME: Response of Organisms to the Martian Environment" (Sci.Eds. C. Cockell & G. Horneck; Eds. J. Vago, C. Walker, K. Fletcher), ESA SP-1299, ESA Publications Division, European Space Agency, Noordwijk, The Netherlands
    1. 2005
    The reality of the compound solution in magnetohydrodynamics
    Brandenburg A., Klingenberg C., Waagan K., Bergene H., Lin Y., Motamed M., Ramstad T. & Virtanen J.
    ''Computational Problems in Physics 2005'', Helsinki, Finland, June 2005
    Eirola, Havu, Jauho & v.Pfaler, Helsinki University of Technology, Inst. of Mathematics, Research Reports C018, 61
    Conf.   PDF

    (Back to top)


    Theses

    2. 2006
    Particle acceleration and turbulence transmission in relativistic parallel shocks
    Tammi J.
    Ph.D. Thesis; University of Turku, May 2006. ISBN: 951-29-2999-6
    Link
    1. 2002
    Modifioitujen relativististen shokkien elektronikiihdytyksen numeerisia simulaatioita (Numerical simulations of electron acceleration in relativistic modified shocks)
    Virtanen J.J.P.
    Master's Thesis; University of Turku, September 2002

    (Back to top)

    Popularised articles, magazine articles, "Ask a scientist"


    19. 2021
    Book review of "Tiedonjano - Vuosi seikkailuja tieteen viidakossa" by Esko Valtaoja, Ursa, 2021, ISBN: 9789527443026
    Tammi, J.
    Tähdet ja avaruus, 8/2021, Tähtitieteellinen yhdistys Ursa, Finland. ISSN 0355-9467

    18. 2021
    Book review of "Mustat aukot - Ajan ja avaruuden rajalla" by Markus Hotakainen, Otava, 2021, ISBN: 978-951-1-37381-0
    Tammi, J.
    Tähdet ja avaruus, 3/2021, Tähtitieteellinen yhdistys Ursa, Finland. ISSN 0355-9467

    17. 2018
    Millimetri, senttimetri, desimetri, metri (Millimetre, decimetre, centimetre, metre - a column)
    Tammi, J.
    Tähdet ja avaruus, 3/2018, Tähtitieteellinen yhdistys Ursa, Finland. ISSN 0355-9467

    16. 2017
    Millaisella planeetalla talvi voisi kestää vuosia? (What kind of planet could have year-long winters?)
    Tammi, J.
    Tähdet ja avaruus, 8/2017, Tähtitieteellinen yhdistys Ursa, Finland. ISSN 0355-9467

    15. 2017
    Miksi valo kulkee kylmässä ilmassa hitaammin kuin kuumassa? (Why does the light move slower in hot air compared to cold air?)
    Tammi, J.
    Tähdet ja avaruus, 7/2017, Tähtitieteellinen yhdistys Ursa, Finland. ISSN 0355-9467

    14. 2016
    Maailmankaikkeus – uhka vai mahdollisuus? (The universe – a threat or an opportunity - a column)
    Tammi, J.
    Tähdet ja avaruus, 6/2016, Tähtitieteellinen yhdistys Ursa, Finland. ISSN 0355-9467

    13. 2015
    Pimeys loistaa poissaolollaan (In the absence of darkness - a column)
    Tammi, J.
    Tähdet ja avaruus, 6/2015, Tähtitieteellinen yhdistys Ursa, Finland. ISSN 0355-9467

    12. 2014
    Havaintoja paljaalla mutta kriittisellä silmällä (Observations with the naked, yet critical eye - a column)
    Tammi, J.
    Tähdet ja avaruus, 5/2014, Tähtitieteellinen yhdistys Ursa, Finland. ISSN 0355-9467

    11. 2013
    Uusavuttoman taivas - pakina (Sky of the neohelpless - a column)
    Tammi, J.
    Tähdet ja avaruus, 6/2013, Tähtitieteellinen yhdistys Ursa, Finland. ISSN 0355-9467

    10. 2013
    Mitkä voimat saavat matkustajan horjahtamaan junan jarruttaessa? (What forces make the passenger stumble in a decelerating train?)
    Tammi, J.
    Tähdet ja avaruus, 4/2013, Tähtitieteellinen yhdistys Ursa, Finland. ISSN 0355-9467

    9. 2012
    Voiko mustasta aukosta saada energiaa? (Can we get energy from a black hole?)
    Tammi, J.
    Tähdet ja avaruus, 6/2012, Tähtitieteellinen yhdistys Ursa, Finland. ISSN 0355-9467

    8. 2012
    Termin avaus: Aika (Elaborating the term: Time)
    Tammi, J.
    Aalto University Magazine, 2/2012, May 2012, Espoo, Finland. ISSN 1799-9324

    7. 2010
    Miten astronautit peseytyvät? (How do astronauts wash themselves?)
    Tammi, J.
    in "Onko linnulla napa? – Ja muita tieteen arvoituksia", Heimonen (Ed.), Sanoma Magazines Finland Oy. ISBN 978-951-32-2962-7

    6. 2007
    Taivaan alkuperiä IV, Metsästysseurue (Celestial Origins, pt. IV, The Hunting Party)
    Tammi, J.
    Vox Paganorum, 4/07, December 2007, Turku, Finland. ISSN: 1457-5906

    5. 2007
    Taivaan alkuperiä III, Perseuksen perhe (Celestial Origins, pt. III, Family of Perseus)
    Tammi, J.
    Vox Paganorum, 3/07, September 2007, Turku, Finland. ISSN: 1457-5906

    4. 2007
    Taivaan alkuperiä II, Kesäkolmion tähdistöt (Celestial Origins, pt. II, Constellations of the Summer Triangle)
    Tammi, J.
    Vox Paganorum, 2/07, June 2007, Turku, Finland. ISSN: 1457-5906

    3. 2007
    Taivaan alkuperiä I, Otava ja kaksi karhua (Celestial Origins, pt. I, The Big Dipper and two Bears)
    Tammi, J.
    Vox Paganorum, 1/07, March 2007, Turku, Finland. ISSN: 1457-5906

    2. 2006
    Miten astronautit peseytyvät? (How do astronauts wash themselves?)
    Virtanen, J.
    in "Voiko nauruun kuolla?", Majaluoma (Ed.), 2006, Sanoma Magazines Finland Oy; ISBN 951-32-2317-5.

    1. 2006
    Miten astronautit peseytyvät? (How do astronauts wash themselves?)
    Virtanen, J.
    Tiede, 2/2006, Sanoma Magazines Finland Oy; ISBN 978-951-32-2962-7.

    (Back to top)