Talvikki Hovatta profile picture
Talvikki
Hovatta
Docent, Department of Physics and Astronomy
Academy Research Fellow, Finnish Centre for Astronomy with ESO

Contact

Vesilinnantie 5
20500
Turku

Areas of expertise

astrophysics
radio astronomy
active galaxies
relativistic jets

Biography

I started as a researcher in the Turku Collegium of Science and Medicine in September 2016. I obtained my PhD in 2009 from Helsinki University of Technology (now Aalto University) on the topic Radio variability of active galactic nuclei: analysis of long-term multifrequency data. I then worked as a postdoctoral research at Purdue University USA (2009-2011) and California Institute of Technology USA (2011-2014). I moved back to Finland in 2014 to work as Academy of Finland postdoctoral fellow at Aalto University, from where I moved to Tuorla Observatory when starting in the collegium researcher position. Since September 2018 I have been working as an Academy of Finland Research Fellow at the Finnish Centre for Astronomy with ESO.

Teaching

I teach in two Master level courses "Radio Astronomy" and "Active Galactic Nuclei". I also advice B.Sc., M.Sc., and Post graduate students.

Research

My main research interest is in active galaxies and their relativistic plasma jets. In my research, I use observations at all wavelengths from radio to very-high-energy gamma rays. At the moment I'm especially interested in magnetic fields in the plasma jets, and how they affect the jet formation and radiation. I use polarization observations in the radio and optical wavelengths to study the magnetic field structures in the jets. For example, I have studied the magnetic fields around jets using millimeter-wavelength observations from the ALMA observatory. I'm also involved in several international research projects where the jets of active galaxies are studied in multiple wavelengths. Recently, I expanded my research to multimessenger astrophysics by studying the connection between the radio emission of active galaxies and the arrival times of high-energy neutrinos.

Publications

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Interstellar scintillation, ISS, and intrinsic variability of radio AGN (2020)

Advances in Space Research
David L. Jauncey, Jun Yi Koay, Hayley Bignall, Jean-Pierre Macquart, Tapio Pursimo, Marcello Giroletti, Talvikki Hovatta, Sebastian Kiehlmann, Barney Rickett, Anthony Readhead, Walter Max-Moerbeck, Harish Vedantham, Cormac Reynolds, James Lovell, Roopesh Ojha, Lucyna Kedziora-Chudczer
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))

Unraveling the Complex Behavior of Mrk 421 with Simultaneous X-Ray and VHE Observations during an Extreme Flaring Activity in 2013 April* (2020)

Astrophysical Journal Supplement
Acciari VA, Ansoldi S, Antonelli LA, Engels AA, Baack D, Babic A, Banerjee B, de Almeida UB, Barrio JA, Gonzalez JB, Bednarek W, Bellizzi LK, Bernardini E, Berti A, Besenrieder J, Bhattacharyya W, Bigongiari C, Biland A, Blanch O, Bonnoli G, Bosnjak Z, Busetto G, Carosi R, Ceribella G, Cerruti M, Chai Y, Chilingarian A, Cikota S, Colak SM, Colin U, Colombo E, Contreras JL, Cortina J, Covino S, D'Elia V, Da Vela P, Dazzi F, De Angelis A, De Lotto B, Del Puppo F, Delfino M, Delgado J, Depaoli D, Di Pierro F, Di Venere L, Espineira ED, Prester DD, Donini A, Dorner D, Doro M, Elsaesser D, Ramazani VF, Fattorini A, Ferrara G, Foffano L, Fonseca MV, Font L, Fruck C, Fukami S, Lopez RJG, Garczarczyk M, Gasparyan S, Gaug M, Giglietto N, Giordano F, Gliwny P, Godinovic N, Green D, Hadasch D, Hahn A, Hassan T, Herrera J, Hoang J, Hrupec D, Hutten M, Inada T, Inoue S, Ishio K, Iwamura Y, Jouvin L, Kajiwara Y, Kerszberg D, Kobayashi Y, Kubo H, Kushida J, Lamastra A, Lelas D, Leone F, Lindfors E, Lombardi S, Longo F, Lopez M, Lopez-Coto R, Lopez-Oramas A, Loporchio S, Fraga BMD, Maggio C, Majumdar P, Makariev M, Mallamaci M, Maneva G, Manganaro M, Mannheim K, Maraschi L, Mariotti M, Martinez M, Mazin D, Mender S, Micanovic S, Miceli D, Miener T, Minev M, Miranda JM, Mirzoyan R, Molina E, Moralejo A, Morcuende D, Moreno V, Moretti E, Munar-Adrover P, Neustroev V, Nigro C, Nilsson K, Ninci D, Nishijima K, Noda K, Nogues L, Nozaki S, Ohtani Y, Oka T, Otero-Santos J, Palatiello M, Paneque D, Paoletti R, Paredes JM, Pavletic L, Penil P, Peresano M, Persic M, Moroni PGP, Prandini E, Puljak I, Rhode W, Ribo M, Rico J, Righi C, Rugliancich A, Saha L, Sahakyan N, Saito T, Sakurai S, Satalecka K, Schleicher B, Schmidt K, Schweizer T, Sitarek J, Snidaric I, Sobczynska D, Spolon A, Stamerra A, Strom D, Strzys M, Suda Y, Suric T, Takahashi M, Tavecchio F, Temnikov P, Terzic T, Teshima M, Torres-Alba N, Tosti L, van Scherpenberg J, Vanzo G, Acosta MV, Ventura S, Verguilov V, Vigorito CF, Vitale V, Vovk I, Will M, Zaric D, Petropoulou M, Finke J, D'Ammando F, Balokovi M, Madejskic G, Mori K, Puccetti S, Leto C, Perri M, Verrecchia F, Villata M, Raiteri CM, Agudo I, Bachev R, Berdyugin A, Blinov DA, Chanishvili R, Chen WP, Chigladze R, Damljanovic G, Eswaraiah C, Grishina TS, Ibryamov S, Jordan B, Jorstad SG, Joshi M, Kopatskaya EN, Kurtanidze OM, Kurtanidze SO, Larionova EG, Larionova LV, Larionov VM, Latev G, Lin HC, Marscher AP, Mokrushina AA, Morozova DA, Nikolashvili MG, Semkov E, Smith PS, Strigachev A, Troitskaya YV, Troitsky IS, Vince O, Barnes J, Guver T, Moody JW, Sadun AC, Hovatta T, Richards JL, Max-Moerbeck W, Readhead ACS, Lahteenmaki A, Tornikoski M, Tammi J, Ramakrishnan V, Reinthal R, Reinthal R, Ramakrishnan V, Tammi J, Tornikoski M, Lahteenmaki A, Readhead ACS, Max-Moerbeck W, Richards JL, Hovatta T, Sadun AC, Moody JW, Guver T, Barnes J, Vince O
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))

Testing two-component models on very high-energy gamma-ray-emitting BL Lac objects (2020)

Astronomy and Astrophysics
V. A. Acciari, S. Ansoldi, L. A. Antonelli, A. Arbet Engels, D. Baack, A. Babić, B. Banerjee, U. Barres de Almeida, J. A. Barrio, J. Becerra González, W. Bednarek, L. Bellizzi, E. Bernardini, A. Berti, J. Besenrieder, W. Bhattacharyya, C. Bigongiari, A. Biland, O. Blanch, G. Bonnoli, Ž. Bošnjak, G. Busetto, R. Carosi, G. Ceribella, M. Cerruti, Y. Chai, A. Chilingarian, S. Cikota, S. M. Colak, U. Colin, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, G. D’Amico, V. D’Elia, P. Da Vela, F. Dazzi, A. De Angelis, B. De Lotto, M. Delfino, J. Delgado, D. Depaoli, F. Di Pierro, L. Di Venere, E. Do Souto Espiñeira, D. Dominis Prester, A. Donini, D. Dorner, M. Doro, D. Elsaesser, V. Fallah Ramazani, A. Fattorini, G. Ferrara, L. Foffano, M. V. Fonseca, L. Font, C. Fruck, S. Fukami, R. J. García López, M. Garczarczyk, S. Gasparyan, M. Gaug, N. Giglietto, F. Giordano, P. Gliwny, N. Godinović, D. Green, D. Hadasch, A. Hahn, J. Herrera, J. Hoang, D. Hrupec, M. Hütten, T. Inada, S. Inoue, K. Ishio, Y. Iwamura, L. Jouvin, Y. Kajiwara, M. Karjalainen, D. Kerszberg, Y. Kobayashi, H. Kubo, J. Kushida, A. Lamastra, D. Lelas, F. Leone, E. Lindfors, S. Lombardi, F. Longo, M. López, R. López-Coto, A. López-Oramas, S. Loporchio, B. Machado de Oliveira Fraga, C. Maggio, P. Majumdar, M. Makariev, M. Mallamaci, G. Maneva, M. Manganaro, K. Mannheim, L. Maraschi, M. Mariotti, M. Martínez, D. Mazin, S. Mender, S. Mićanović, D. Miceli, T. Miener, M. Minev, J. M. Miranda, R. Mirzoyan, E. Molina, A. Moralejo, D. Morcuende, V. Moreno, E. Moretti, P. Munar-Adrover, V. Neustroev, C. Nigro, K. Nilsson, D. Ninci, K. Nishijima, K. Noda, L. Nogués, S. Nozaki, Y. Ohtani, T. Oka, J. Otero-Santos, M. Palatiello, D. Paneque, R. Paoletti, J. M. Paredes, L. Pavletić, P. Peñil, M. Peresano, M. Persic, P. G. Prada Moroni, E. Prandini, I. Puljak, W. Rhode, M. Ribó, J. Rico, C. Righi, A. Rugliancich, L. Saha, N. Sahakyan, T. Saito, S. Sakurai, K. Satalecka, B. Schleicher, K. Schmidt, T. Schweizer, J. Sitarek, I. Šnidarić, D. Sobczynska, A. Spolon, A. Stamerra, D. Strom, M. Strzys, Y. Suda, T. Surić, M. Takahashi, F. Tavecchio, P. Temnikov, T. Terzić, M. Teshima, N. Torres-Albà, L. Tosti, J. van Scherpenberg, G. Vanzo, M. Vazquez Acosta, S. Ventura, V. Verguilov, C. F. Vigorito, V. Vitale, I. Vovk, M. Will, D. Zarić, M. Nievas-Rosillo, C. Arcaro, F. D’ Ammando, F. de Palma, M. Hodges, T. Hovatta, S. Kiehlmann, W. Max-Moerbeck, A. C. S. Readhead, R. Reeves, L. Takalo, R. Reinthal, J. Jormanainen, F. Wierda, S. M. Wagner, A. Berdyugin, A. Nabizadeh, N. Talebpour Sheshvan, A. Oksanen, R. Bachev, A. Strigachev, P. Kehusmaa
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))

The Great Markarian 421 Flare of 2010 February: Multiwavelength Variability and Correlation Studies (2020)

Astrophysical Journal
Abeysekara A.U., Benbow W., Bird R., Brill A., Brose R., Buchovecky M., Buckley J.H., Christiansen J.L., Chromey A.J., Daniel M.K., Dumm J., Falcone A., Feng Q., Finley J.P., Fortson L., Furniss A., Galante N., Gent A., Gillanders G.H., Giuri C., Gueta O., Hassan T., Hervet O., Holder J., Hughes G., Humensky T.B., Johnson C.A., Kaaret P., Kar P., Kelley-Hoskins N., Kertzman M., Kieda D., Krause M., Krennrich F., Kumar S., Lang M.J., Moriarty P., Mukherjee R., Nelson T., Nieto D., Nievas-Rosillo M., O'Brien S., Ong R.A., Otte A.N., Park N., Petrashyk A., Pichel A., Pohl M., Prado R.R., Pueschel E., Quinn J., Ragan K., Reynolds P.T., Richards G.T., Roache E., Rovero A.C., Rulten C., Sadeh I., Santander M., Sembroski G.H., Shahinyan K., Stevenson B., Sushch I., Tyler J., Vassiliev V.V., Wakely S.P., Weinstein A., Wells R.M., Wilcox P., Wilhelm A., Williams D.A., Zitzer B., Acciari V.A., Ansoldi S., Antonelli L.A., Arbet Engels A., Baack D., Babić A., Banerjee B., Barres De Almeida U., Barrio J.A., Becerra González J., Bednarek W., Bellizzi L., Bernardini E., Berti A., Besenrieder J., Bhattacharyya W., Bigongiari C., Biland A., Blanch O., Bonnoli G., Busetto G., Carosi R., Ceribella G., Chai Y., Cikota S., Colak S.M., Colin U., Colombo E., Contreras J.L., Cortina J., Covino S., D'Elia V., Da Vela P., Dazzi F., De Angelis A., De Lotto B., Delfino M., Delgado J., Di Pierro F., Do Souto Espiñera E., Dominis Prester D., Dorner D., Doro M., Einecke S., Elsaesser D., Fallah Ramazani V., Fattorini A., Fernández-Barral A., Ferrara G., Fidalgo D., Foffano L., Fonseca M.V., Font L., Fruck C., Galindo D., Gallozzi S., García López R.J., Garczarczyk M., Gasparyan S., Gaug M., Godinović N., Green D., Guberman D., Hadasch D., Hahn A., Herrera J., Hoang J., Hrupec D., Inoue S., Ishio K., Iwamura Y., Kubo H., Kushida J., Lamastra A., Lelas D., Leone F., Lindfors E., Lombardi S., Longo F., López M., López-Coto R., López-Oramas A., Machado De Oliveira Fraga B., Maggio C., Majumdar P., Makariev M., Mallamaci M., Maneva G., Manganaro M., Mannheim K., Maraschi L., Mariotti M., Martínez M., Masuda S., Mazin D., Miceli D., Minev M., Miranda J.M., Mirzoyan R., Molina E., Moralejo A., Morcuende D., Moreno V., Moretti E., Munar-Adrover P., Neustroev V., Niedzwiecki A., Nievas Rosillo M., Nigro C., Nilsson K., Ninci D., Nishijima K., Noda K., Nogués L., Nöthe M., Paiano S., Palacio J., Palatiello M., Paneque D., Paoletti R., Paredes J.M., Peñil P., Peresano M., Persic M., Prada Moroni P.G., Prandini E., Puljak I., Rhode W., Ribó M., Rico J., Righi C., Rugliancich A., Saha L., Sahakyan N., Saito T., Satalecka K., Schweizer T., Sitarek J., Šnidarić I., Sobczynska D., Somero A., Stamerra A., Strom D., Strzys M., Sun S., Surić T., Tavecchio F., Temnikov P., Terzić T., Teshima M., Torres-Alba N., Tsujimoto S., Van Scherpenberg J., Vanzo G., Vazquez Acosta M., Vovk I., Will M., Zarić D., Aller H.D., Aller M.F., Carini M.T., Horan D., Jordan B., Jorstad S.G., Kurtanidze O.M., Kurtanidze S.O., Lahteenmaki A., Larionov V.M., Larionova E.G., Madejski G., Marscher A.P., Max-Moerbeck W., Moody J.W., Morozova D.A., Nikolashvili M.G., Raiteri C.M., Readhead A.C.S., Richards J.L., Sadun A.C., Sakamoto T., Sigua L.A., Smith P.S., Talvikki H., Tammi J., Tornikoski M., Troitsky I.S., Villata M.
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))

A Decade of Multiwavelength Observations of the TeV Blazar 1ES 1215+303: Extreme Shift of the Synchrotron Peak Frequency and Long-term Optical-Gamma-Ray Flux Increase (2020)

Astrophysical Journal
Valverde J, Horan D, Bernard D, Fegan S, Abeysekara AU, Archer A, Benbow W, Bird R, Brill A, Brose R, Buchovecky M, Buckley JH, Christiansen JL, Cui W, Falcone A, Feng Q, Finley JP, Fortson L, Furniss A, Gent A, Gillanders GH, Giuri C, Gueta O, Hanna D, Hassan T, Hervet O, Holder J, Hughes G, Humensky TB, Kaaret P, Kelley-Hoskins N, Kertzman M, Kieda D, Krause M, Krennrich F, Lang MJ, Maier G, Moriarty P, Mukherjee R, Nieto D, Nievas-Rosillo M, O'Brien S, Ong RA, Otte AN, Park N, Petrashyk A, Pfrang K, Pichel A, Pohl M, Prado RR, Pueschel E, Quinn J, Ragan K, Reynolds PT, Ribeiro D, Richards GT, Roache E, Sadeh I, Santander M, Scott SS, Sembroski GH, Shahinyan K, Shang R, Sushch I, Vassiliev VV, Weinstein A, Wells RM, Wilcox P, Wilhelm A, Williams DA, Williamson TJ, Noto G, Edwards PG, Piner BG, Ramazani VF, Hovatta T, Jormanainen J, Lindfors E, Nilsson K, Takalo L, Kovalev YY, Lister ML, Pushkarev AB, Savolainen T, Kiehlmann S, Max-Moerbeck W, Readhead ACS, Lahteenmaki A, Tornikoski M
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))

An intermittent extreme BL Lac: MWL study of 1ES 2344+514 in an enhanced state (2020)

Monthly Notices of the Royal Astronomical Society
V A Acciari, S Ansoldi, L A Antonelli, A Arbet Engels, A Babić, B Banerjee, U Barres de Almeida, J A Barrio, J Becerra González, W Bednarek, L Bellizzi, E Bernardini, A Berti, J Besenrieder, W Bhattacharyya, C Bigongiari, O Blanch, G Bonnoli, Ž Bošnjak, G Busetto, R Carosi, G Ceribella, M Cerruti, Y Chai, A Chilingaryan, S Cikota, S M Colak, U Colin, E Colombo, J L Contreras, J Cortina, S Covino, V D’Elia, P Da Vela, F Dazzi, A De Angelis, B De Lotto, M Delfino, J Delgado, D Depaoli, F Di Pierro, L Di Venere, E Do Souto Espiñeira, D Dominis Prester, A Donini, M Doro, D Elsaesser, V Fallah Ramazani, A Fattorini, G Ferrara, L Foffano, M V Fonseca, L Font, C Fruck, S Fukami, R J García López, M Garczarczyk, S Gasparyan, M Gaug, N Giglietto, F Giordano, N Godinović, P Gliwny, D Green, D Hadasch, A Hahn, J Herrera, J Hoang, D Hrupec, M Hütten, T Inada, S Inoue, K Ishio, Y Iwamura, L Jouvin, Y Kajiwara, D Kerszberg, Y Kobayashi, H Kubo, J Kushida, A Lamastra, D Lelas, F Leone, E Lindfors, S Lombardi, F Longo, M López, R López-Coto, A López-Oramas, S Loporchio, B Machado de Oliveira Fraga, C Maggio, P Majumdar, M Makariev, M Mallamaci, G Maneva, M Manganaro, L Maraschi, M Mariotti, M Martínez, D Mazin, S Mender, S Mićanović, D Miceli, T Miener, M Minev, J M Miranda, R Mirzoyan, E Molina, A Moralejo, D Morcuende, V Moreno, E Moretti, P Munar-Adrover, V Neustroev, C Nigro, K Nilsson, D Ninci, K Nishijima, K Noda, L Nogués, S Nozaki, Y Ohtani, T Oka, J Otero-Santos, S Paiano, M Palatiello, D Paneque, R Paoletti, J M Paredes, L Pavletić, P Peñil, M Peresano, M Persic, P G Prada Moroni, E Prandini, I Puljak, M Ribó, J Rico, C Righi, A Rugliancich, L Saha, N Sahakyan, T Saito, S Sakurai, K Satalecka, B Schleicher, K Schmidt, T Schweizer, J Sitarek, I Šnidarić, D Sobczynska, A Spolon, A Stamerra, D Strom, M Strzys, Y Suda, T Surić, M Takahashi, F Tavecchio, P Temnikov, T Terzić, M Teshima, N Torres-Albà, L Tosti, J van Scherpenberg, G Vanzo, M Vazquez Acosta, S Ventura, V Verguilov, C F Vigorito, V Vitale, I Vovk, M Will, D Zarić, FACT Collaboration: D Baack, M Balbo, M Beck, N Biederbeck, A Biland, M Blank, T Bretz, K Bruegge, M Bulinski, J Buss, M Doerr, D Dorner, D Hildebrand, R Iotov, M Klinger, K Mannheim, S Achim Mueller, D Neise, A Neronov, M Nöthe, A Paravac, W Rhode, B Schleicher, K Sedlaczek, A Shukla, V Sliusar, L Tani, F Theissen, R Walter, MWL Collaborators: J Acosta Pulido, A V Filippenko, T Hovatta, S Kiehlmann, V M Larionov, W Max-Moerbeck, C M Raiteri, A C S Readhead, M Šegon, M Villata, W Zheng
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))