Talvikki Hovatta
 


talvikki.hovatta@utu.fi

Vesilinnantie 5

Turku


ORCID identifierhttps://orcid.org/0000-0002-2024-8199





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
  
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  • The high brightness temperature of B0529+483 revealed by RadioAstron and implications for interstellar scattering  (2018)  
    • Monthly Notices of the Royal Astronomical Society
     S. V. Pilipenko, Y. Y. Kovalev, A. S. Andrianov, U. Bach, S. Buttaccio, P. Cassaro, G. Cim`o, P. G. Edwards, M. P. Gawro´nski, L. I. Gurvits, T. Hovatta, D. L. Jauncey, M. D. Johnson, Yu. A. Kovalev, A. M. Kutkin, M. M. Lisakov, A. E. Melnikov, A. Orlati, A. G. Rudnitskiy, K. V. Sokolovsky, C. Stanghellini,P. de Vicente, P. A. Voitsik,P. Wolak, G. V. Zhekanis
    (
    A1 Refereed original research article in a scientific journal)


  • 37 GHz observations of narrow-line Seyfert 1 galaxies  (2017)  
    • Astronomy and Astrophysics
     Lahteenmaki A, Jarvela E, Hovatta T, Tornikoski M, Harrison DL, Lopez-Caniego M, Max-Moerbeck W, Mingaliev M, Pearson TJ, Ramakrishnan V, Readhead ACS, Reeves RA, Richards JL, Sotnikova Y, Tammi J
    (
    A1 Refereed original research article in a scientific journal)


  • A connection between γ-ray and parsec-scale radio flares in the blazar 3C 273  (2017)  
    • Monthly Notices of the Royal Astronomical Society
     Lisakov MM, Kovalev YY, Savolainen T, Hovatta T, Kutkin AM
    (
    A1 Refereed original research article in a scientific journal)


  • A Search for Spectral Hysteresis and Energy-dependent Time Lags from X-Ray and TeV Gamma-Ray Observations of Mrk 421  (2017)  
    • Astrophysical Journal
     Abeysekara AU, Archambault S, Archer A, Benbow W, Bird R, Buchovecky M, Buckley JH, Bugaev V, Cardenzana JV, Cerruti M, Chen X, Ciupik L, Connolly MP, Cui W, Eisch JD, Falcone A, Feng Q, Finley JP, Fleischhack H, Flinders A, Fortson L, Furniss A, Griffin S, Hakansson MH, Hanna D, Hervet O, Holder J, Humensky TB, Kaaret P, Kar P, Kertzman M, Kieda D, Krause M, Kumar S, Lang MJ, Maier G, McArthur S, McCann A, Meagher K, Moriarty P, Mukherjee R, Nieto D, Ong SOA, Otte AN, Park N, Pelassa V, Pohl M, Popkow A, Pueschel E, Ragan K, Reynolds PT, Richards GT, Roache E, Sadeh I, Santander M, Sembroski GH, Shahinyan K, Staszak D, Telezhinsky I, Tucci JV, Tyler J, Wakely SP, Weinstein A, Wilhelm A, Williams DA, Ahnen ML, Ansoldi S, Antonelli LA, Antoranz P, Arcaro C, Babic A, Banerjee B, Bangale P, de Almeida UB, Barrio JA, Gonzalez JB, Bednarek W, Bernardini E, Berti A, Biasuzzi B, Biland A, Blanch O, Bonnefoy S, Bonnoli G, Borracci F, Bretz T, Carosi R, Carosi A, Chatterjee A, Colin P, Colombo E, Contreras JL, Cortina J, Covino S, Cumani P, Da Vela P, Dazzi F, De Angelis A, De Lotto B, Wilhelmi ED, Di Pierro F, Doert M, Dominguez A, Prester DD, Dorner D, Doro M, Einecke S, Glawion DE, Elsaesser D, Engelkemeier M, Ramazani VF, Fernandez-Barral A, Fidalgo D, Fonseca MV, Font L, Fruck C, Galindo D, Lopez RJG, Garczarczyk M, Gaug M, Giammaria P, Godinovic N, Gora D, Guberman D, Hadasch D, Hahn A, Hassan T, Hayashida M, Herrera J, Hose J, Hrupec D, Hughes G, Idec W, Kodani K, Konno Y, Kubo H, Kushida J, Lelas D, Lindfors E, Lombardi S, Longo F, Lopez M, Lopez-Coto R, Majumdar P, Makariev M, Mallot K, Maneva G, Manganaro M, Mannheim K, Maraschi L, Marcote B, Mariotti M, Martinez M, Mazin D, Menzel U, Mirzoyan R, Moralejo A, Moretti E, Nakajima D, Neustroev V, Niedzwiecki A, Rosillo MN, Nilsson K, Nishijima K, Noda K, Nogues L, Nothe M, Paiano S, Palacio J, Palatiello M, Paneque D, Paoletti R, Paredes JM, Paredes-Fortuny X, Pedaletti G, Peresano M, Perri L, Persic M, Poutanen J, Moroni PGP, Prandini E, Puljak I, Garcia JR, Reichardt I, Rhode W, Ribo M, Rico J, Saito T, Satalecka K, Schroeder S, Schweizer T, Shore SN, Sillanpaa A, Sitarek J, Snidaric I, Sobczynska D, Stamerra A, Strzys M, Suric T, Takalo L, Tavecchio F, Temnikov P, Terzic T, Tescaro D, Teshima M, Torres DF, Torres-Alba N, Toyama T, Treves A, Vanzo G, Acosta MV, Vovk I, Ward JE, Will M, Wu MH, Zanin R, Hovatta T, Perez ID, Smith PS, Racero E, Balokovic M
    (
    A1 Refereed original research article in a scientific journal)


  • Bimodal radio variability in OVRO-40 m-monitored blazars  (2017)  
    • Monthly Notices of the Royal Astronomical Society
     I. Liodakis, V. Pavlidou, T. Hovatta, W. Max-Moerbeck, T. J. Pearson, J. L. Richards, A. C. S. Readhead
    (
    A1 Refereed original research article in a scientific journal)


  • Observational View of Magnetic Fields in Active Galactic Nuclei Jets  (2017)  
    • Proceedings of the International Astronomical Union
    New Frontiers in Black Hole Astrophysics Hovatta Talvikki
    (
    A4 Refereed article in a conference publication )


  • PKS 1954-388: RadioAstron Detection on 80,000 km Baselines and Multiwavelength Observations  (2017)  
    • Publications of the Astronomical Society of Australia
     Edwards PG, Kovalev YY, Ojha R, An H, Bignall H, Carpenter B, Hovatta T, Stevens J, Voytsik P, Andrianov AS, Dutka M, Hase H, Horiuchi S, Jauncey DL, Kadler M, Lisakov M, Lovell JEJ, McCallum J, Muller C, Phillips C, Plotz C, Quick J, Reynolds C, Schulz R, Sokolovsky KV, Tzioumis AK, Zuga V, Zuga V
    (
    A1 Refereed original research article in a scientific journal)


  • Reconciling inverse-Compton Doppler factors with variability Doppler factors in blazar jets  (2017)  
    • Astronomy and Astrophysics
     Liodakis I, Zezas A, Angelakis E, Hovatta T, Pavlidou V
    (
    A1 Refereed original research article in a scientific journal)


  • Symmetric Achromatic Variability in Active Galaxies: A Powerful New Gravitational Lensing Probe?  (2017)  
    • Astrophysical Journal
     Vedantham HK, Readhead ACS, Hovatta T, Pearson TJ, Blandford RD, Gurwell MA, Lahteenmaki A, Max-Moerbeck W, Pavlidou V, Ravi V, Reeves RA, Richards JL, Tornikoski M, Zensus JA
    (
    A1 Refereed original research article in a scientific journal)


  • The dependence of optical polarisation of blazars on the synchrotron peak frequency  (2017)  Proceedings of Science: The proceedings of the 7th Fermi Symposium Pavlidou V., Myserlis I., Anton Zensus J., Angelakis E., Blinov D., Bttcher M., Hovatta T., Kiehlmann S.
    (
    A4 Refereed article in a conference publication )


  • The First VHE Detection of the Blazar S4 0954+65 with the MAGIC Telescopes during an Exceptionally High Optical State  (2017)  
    • AIP Conference Proceedings
    High energy gamma-ray astronomy: 6th international meeting on high energy gamma-ray astronomy Pedaletti G, Manganaro M, Doert M, Lindfors E, Rosillo MN, Ramazani VF, Gonzalez JB, Tanakas Y, Ojha R, Finke J, Jorstad S, Marscher A, Larionov V, Borman G, Troitsky I, Lahteenmaki A, Tornikoski M, Hovatta T
    (
    A4 Refereed article in a conference publication )


  • The Peculiar Light Curve of J1415+1320: A Case Study in Extreme Scattering Events  (2017)  
    • Astrophysical Journal
     Vedantham HK, Readhead ACS, Hovatta T, Koopmans LVE, Pearson TJ, Blandford RD, Gurwell MA, Lahteenmaki A, Max-Moerbeck W, Pavlidou V, Ravi V, Reeves RA, Richards JL, Tornikoski M, Zensus JA
    (
    A1 Refereed original research article in a scientific journal)


  • Ringo2 Optical Polarimetry of Blazars  (2016)  
    • Galaxies
     Helen Jermak, Iain Steele, Elina Lindfors, Talvikki Hovatta, Kari Nilsson, Gavin Lamb, Carole Mundell, Ulisses Barres De Almeida, Andrei Berdyugin, Ville Kadenius, Riho Reinthal, Leo Takalo
    (
    A1 Refereed original research article in a scientific journal)



Last updated on 15/04/2024 09:52:27 PM