Talvikki Hovatta
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.
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.
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.
Publications
- TELAMON, Metsahovi, Medicina, OVRO and RATAN-600 programs find a long-term radio flare in PKS0735+17 coincident with IceCube-211208A #15105 (2021) Astronomer's Telegram Kadler Matthias, Benke Petra, Gokus Andrea, Hessdoerfer Jonas, Sinapius Jonas, Weber Philip; for the TELAMON Team, Tornikoski Merja, Righini Simona, Marchili Nicola, Hovatta Talvikki, Readhead Anthony C, Kiehlmann Sebastian, Kovalev Yuri A, Popkov Alexander V, Kovalev Yuri Y
(D2 Article in a professional compilation book)
- The Relativistic Jet Orientation and Host Galaxy of the Peculiar Blazar PKS 1413+135 (2021) Readhead ACS, Ravi V, Liodakis I, Lister ML, Singh V, Aller MF, Blandford RD, Browne IWA, Gorjian V, Grainge KJB, Gurwell MA, Hodges MW, Hovatta T, Kiehlmann S, Lahteenmaki A, Mcaloone T, Max-Moerbeck W, Pavlidou V, Pearson TJ, Peirson AL, Perlman ES, Reeves RA, Soifer BT, Taylor GB, Tornikoski M, Vedantham HK, Werner M, Wilkinson PN, Zensus JA, Zensus JA
(A1 Refereed original research article in a scientific journal)
- The time-dependent distribution of optical polarization angle changes in blazars (2021)
- Monthly Notices of the Royal Astronomical Society
Kiehlmann S, Blinov D, Liodakis I, Pavlidou V, Readhead ACS, Angelakis E, Casadio C, Hovatta T, Kylafis N, Mahabal A, Mandarakas N, Myserlis I, Panopoulou GV, Pearson TJ, Ramaprakash A, Reig P, Skalidis R, Tassis K, Zensus JA, Slowikowska A
(A1 Refereed original research article in a scientific journal)
- VHE gamma-ray detection of FSRQ QSO B1420+326 and modeling of its enhanced broadband state in 2020 (2021)
- Astronomy and Astrophysics
Weaver Z.R., Marscher A.P., Jorstad S.G., Vera R.J.C., Borman G.A., Larionov V.M., Hallum M.K., Hart M., Nikiforova A.A., Larionova E.G., Kopatskaya E.N., Grishina T.S., Troitsky I.S., Troitskaya Y.V., Savchenko S.S., Morozova D.A., Prajapati P., Kumar P., Orienti M., Pacciani L., Kurtenkov A., Marchini A., Ganesh S., Minev M., Porras A., Recillas E., Carrasco L., Escobedo G., Berton M., Tammi J., Lähteenmäki A., Tornikoski M., Vasilyev A.A., Hodges M., Hovatta T., Kiehlmann S., Max-Moerbeck W., Readhead A.C.S., Reeves R., Pearson T.J., Ansoldi S., Acciari V.A., Baack D., Babić A., Baquero A., Barres De Almeida U., Antonelli L.A., Arbet Engels A., Artero M., Asano K., Bernardini E., Bernardos M., Berti A., Besenrieder J., Barrio J.A., Becerra González J., Bednarek W., Bellizzi L., Bošnjak A., Bonnoli G., Carosi R., Busetto G., Bigongiari C., Bhattacharyya W., Blanch O., Biland A., Colak S.M., Cikota S., Contreras J.L., Colombo E., Cerruti M., Ceribella G., Chilingarian A., Chai Y., De Angelis A., De Lotto B., Da Vela P., Dazzi F., D'Amico G., D'Elia V., Cortina J., Covino S., Do Souto Espiñeira E., Dominis Prester D., Di Pierro F., Di Venere L., Delgado Mendez C., Depaoli D., Delfino M., Delgado J., Foffano L., Ferrara G., Fattorini A., Fallah Ramazani V., Elsaesser D., Doro M., Dorner D., Donini A., Gaug M., Gasparyan S., Garczarczyk M., Garciá López R.J., Fukami S., Fruck C., Font L., Fonseca M.V., Herrera J., Heckmann L., Hrupec D., Hoang J., Inada T., Hütten M., Ishio K., Inoue S., Giordano F., Giglietto N., Godinović N., Gliwny P., Green D., Green J.G., Hahn A., Hadasch D., Kushida J., Lamastra A., Lelas D., Leone F., Lindfors E., Lombardi S., Longo F., López-Coto R., Iwamura Y., Jormanainen J., Jouvin L., Kajiwara Y., Karjalainen M., Kerszberg D., Kobayashi Y., Kubo H., Maraschi L., Mannheim K., Manganaro M., Maneva G., Mender S., Mazin D., Martínez M., Mariotti M., Machado De Oliveira Fraga B., Loporchio S., López-Oramas A., López-Moya M., Mallamaci M., Makariev M., Majumdar P., Maggio C., Moretti E., Neustroev V., Morcuende D., Moreno V., Ninci D., Nishijima K., Nigro C., Nilsson K., Miener T., Minev M., Micánović S., Miceli D., Molina E., Moralejo A., Miranda J.M., Mirzoyan R., Persic M., Perennes C., Prandini E., Prada Moroni P.G., Paredes J.M., Paoletti R., Peñil P., Pavletić L., Paiano S., Otero-Santos J., Paneque D., Palatiello M., Nozaki S., Noda K., Oka T., Ohtani Y., Saturni F.G., Schleicher B., Schmidt K., Schweizer T., Sahakyan N., Saito T., Sakurai S., Satalecka K., Rico J., Righi C., Rugliancich A., Saha L., Priyadarshi C., Puljak I., Rhode W., Ribó M., Tosti L., Torres-Albà N., Teshima M., Terzić T., Temnikov P., Tavecchio F., Takahashi M., Surić T., Suda Y., Strzys M., Strom D., Stamerra A., Spolon A., Sobczynska D., Šnidarić I., Sitarek J., Ciprini S., Cheung C.C., Angioni R., D'Ammando F., Will M., Zarić D., Vitale V., Vovk I., Verguilov V., Vigorito C.F., Vazquez Acosta M., Ventura S., Van Scherpenberg J., Vanzo G., Truzzi S., Tutone A.
(A1 Refereed original research article in a scientific journal)
- 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) 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
(A1 Refereed original research article in a scientific journal)
- 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
(A1 Refereed original research article in a scientific journal)
- Diagnosing Magnetic Field Geometry in Blazar Jets Using Multi-Frequency, Centimeter-Band Polarimetry and Radiative Transfer Modeling (2020) Margo Aller, Philip Hughes, Hugh Aller, Talvikki Hovatta
(A1 Refereed original research article in a scientific journal)
- 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
(A1 Refereed original research article in a scientific journal)
- Multiwavelength behaviour of the blazar 3C 279: decade-long study from gamma-ray to radio (2020)
- Monthly Notices of the Royal Astronomical Society
Larionov VM, Jorstad SG, Marscher AP, Villata M, Raiteri CM, Smith PS, Agudo I, Savchenko SS, Morozova DA, Acosta-Pulido JA, Aller MF, Aller HD, Andreeva TS, Arkharov AA, Bachev R, Bonnoli G, Borman GA, Bozhilov V, Calcidese P, Carnerero MI, Carosati D, Casadio C, Chen WP, Damljanovic G, Dementyev AV, Di Paola A, Frasca A, Fuentes A, Gomez JL, Gonzalez-Morales P, Giunta A, Grishina TS, Gurwell MA, Hagen-Thorn VA, Hovatta T, Ibryamov S, Joshi M, Kiehlmann S, Kim JY, Kimeridze GN, Kopatskaya EN, Kovalev YA, Kovalev YY, Kurtanidze OM, Kurtanidze SO, Lahteenmaki A, Lazaro C, Larionova LV, Larionova EG, Leto G, Marchini A, Matsumoto K, Mihov B, Minev M, Mingaliev MG, Mirzaqulov D, Dimitrova RVM, Myserlis I, Nikiforova AA, Nikolashvili MG, Nizhelsky NA, Ovcharov E, Pressburger LD, Rakhimov IA, Righini S, Rizzi N, Sadakane K, Sadun AC, Samal MR, Sanchez RZ, Semkov E, Sergeev SG, Sigua LA, Slavcheva-Mihova L, Sola P, Sotnikova YV, Strigachev A, Thum C, Traianou E, Troitskaya YV, Troitsky IS, Tsybulev PG, Vasilyev AA, Vince O, Weaver ZR, Williamson KE, Zhekanis GV, Weaver ZR, Vince O, Zhekanis GV, Williamson KE, Vasilyev AA
(A1 Refereed original research article in a scientific journal)
- 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
(A1 Refereed original research article in a scientific journal)
