Accès ouvert déclaré
2024
preprint
Time-dependent modelling of short-term variability in the TeV-blazar VER J0521+211 during the major flare in 2020
MAGIC Collaboration, S Abe, J. Abhir, A Abhishek, V A Acciari, A Aguasca-Cabot, I Agudo, T Aniello, S. Ansoldi, L A Antonelli, A Arbet Engels, C Arcaro, M. Artero, K Asano, D. Baack, A Babić, U Barres de Almeida, J A Barrio, I. Batković, A. Bautista, J Baxter, J. Becerra González, W. Bednarek, E. Bernardini, J Bernete, A Berti, J Besenrieder, C Bigongiari, A Biland, O Blanch, G Bonnoli, Ž. Bošnjak, E. Bronzini, I Burelli, A. Campoy-Ordaz, A. Carosi, R Carosi, M. Carretero-Castrillo, A J Castro-Tirado, D. Cerasole, G Ceribella, Y. Chai, A Cifuentes, 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, R de Menezes, M Delfino, J. Delgado, C Delgado Mendez, F. Di Pierro, R. Di Tria, L. Di Venere, D Dominis Prester, A Donini, D Dorner, M. Doro, L. Eisenberger, D Elsaesser, J. Escudero, L. Fariña, A. Fattorini, L Foffano, L Font, S Fröse, S Fukami, Y. Fukazawa, R. J. García López, M. Garczarczyk, S Gasparyan, M Gaug, J. G. Giesbrecht Paiva, N Giglietto, F. Giordano, P Gliwny, T Gradetzke, R Grau, D Green, J G Green, P Günther, D. Hadasch, A. Hahn, T Hassan, L. Heckmann, J Herrera Llorente, D Hrupec, R Imazawa, K. Ishio, I Jiménez Martínez, J Jormanainen, S. Kankkunen, T. Kayanoki, D. Kerszberg, G. W. Kluge, Y. Kobayashi, P M Kouch, H Kubo, J. Kushida, M Láinez, A Lamastra, F. Leone, E. Lindfors, S. Lombardi, F. Longo, Marcos López, M López-Moya, A López-Oramas, S Loporchio, A Lorini, E Lyard, B. Machado de Oliveira Fraga, P Majumdar, M. Makariev, G Maneva, M Manganaro, S. Mangano, K Mannheim, M Mariotti, M. Martínez, M. Martínez-Chicharro, A. Mas-Aguilar, D. Mazin, S Menchiari, S. Mender, D Miceli, T. Miener, J. M. Miranda, R. Mirzoyan, M. Molero González, E. Molina, H A Mondal, A Moralejo, D. Morcuende, T. Nakamori, C Nanci, V Neustroev, L Nickel, M. Nievas Rosillo, C Nigro, L Nikolić, K. Nilsson, K Nishijima, T. Njoh Ekoume, K Noda, S. Nozaki, Y Ohtani, A. Okumura, J. Otero-Santos, S. Paiano, D. Paneque, R. Paoletti, J. M. Paredes, M. Peresano, M. Persic, M. Pihet, G. Pirola, F. Podobnik, P. G. Prada Moroni, E. Prandini, G. Principe, W. Rhode, M. Ribó, J. Rico, C. Righi, N. Sahakyan, T. Saito, F. G. Saturni, K. Schmidt, F. Schmuckermaier, J. L. Schubert, T. Schweizer, A. Sciaccaluga, G. Silvestri, J. Sitarek, V. Sliusar, D. Sobczynska, A. Spolon, A Stamerra, J. Strišković, D. Strom, M. Strzys, Y. Suda, H. Tajima, M. Takahashi, R. Takeishi, P. Temnikov, K. Terauchi, T. Terzić, M. Teshima, S. Truzzi, A. Tutone, S. Ubach, J. van Scherpenberg, M Vazquez Acosta, S Ventura, G. Verna, I. Viale, C. F. Vigorito, V. Vitale, I. Vovk, R. Walter, F. Wersig, M. Will, C. Wunderlich, T. Yamamoto, MWL collaborators, A. V. Filippenko, R. Bachev, V. Fallah Ramazani, A. V. Filippenko, T. Hovatta, S. G. Jorstad, S. Kiehlmann, A. Lähteenmäki, I. Liodakis, A. P. Marscher, W. Max-Moerbeck, A. Omeliukh, T. Pursimo, A. C. S. Readhead, X. Rodrigues, M. Tornikoski, F. Wierda, W. Zheng
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Le résumé fourni par la source
The BL Lacertae object VER J0521+211 underwent a notable flaring episode in February 2020. A short-term monitoring campaign, led by the MAGIC (Major Atmospheric Gamma Imaging Cherenkov) collaboration, covering a wide energy range from radio to very high-energy (VHE, 100 GeV < E < 100 TeV) gamma rays was organised to study its evolution. These observations resulted in a consistent detection of the source over six consecutive nights in the VHE gamma-ray domain. Combining these nightly observations with an extensive set of multi-wavelength data made modelling of the blazar’s spectral energy distribution (SED) possible during the flare. This modelling was performed with a focus on two plausible emission mechanisms: (i) a leptonic two-zone synchrotron-self-Compton scenario, and (ii) a lepto-hadronic one-zone scenario. Both models effectively replicated the observed SED from radio to the VHE gamma-ray band. Furthermore, by introducing a set of evolving parameters, both models were successful in reproducing the evolution of the fluxes measured in different bands throughout the observing campaign. Notably, the lepto-hadronic model predicts enhanced photon and neutrino fluxes at ultra-high energies (E > 100 TeV). While the photon component, generated via decay of neutral pions, is not directly observable as it is subject to intense pair production (and therefore extinction) through interactions with the cosmic microwave background photons, neutrino detectors (e.g. IceCube) can probe the predicted neutrino component. Finally, the analysis of the gamma-ray spectra, observed by MAGIC and the Fermi-LAT telescopes, yielded a conservative 95% confidence upper limit of z ≤ 0.244 for the redshift of this blazar.Key words: galaxies: active / BL Lacertae objects: individual: VER J0521+211 / gamma rays: galaxies⋆⋆ Eustace Specialist in Astronomy.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
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Astrophysics and Cosmic PhenomenaParticle physics theoretical and experimental studiesRadio Astronomy Observations and Technology