Investigation of the correlation patterns and the Compton dominance variability of Mrk 421 in 2017 (CROSBI ID 308785)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
MAGIC Collaboration ; Acciari, V. A. ; Ansoldi, S. ; Antonelli, L. A. ; Arbet Engels, A. ; Artero, M. ; Asano, K. ; Babić, A. ; Baquero, A. ; Barres de Almeida, U. ; Barrio, J. A. ; Batković, I. ; Becerra González, J. ; Bednarek, W. ; Bellizzi, L. ; Bernardini, E. ; Bernardos, M. ; Berti, A. ; Besenrieder, J. ; Bhattacharyya, W. ; Bigongiari, C. ; Blanch, O. ; Bošnjak, Ž. ; Busetto, G. ; Carosi, R. ; Ceribella, G. ; Cerruti, M. ; Chai, Y. ; Chilingarian, A. ; Cikota, S. ; Colak, S. M. ; Colombo, E. ; Contreras, J. L. ; Cortina, J. ; Covino, S. ; D’Amico, G. ; D’Elia, V. ; Da Vela, P. ; Dazzi, F. ; De Angelis, A. ; De Lotto, B. ; Delfino, M. ; Delgado, J. ; Delgado Mendez, C. ; Depaoli, D. ; Di Pierro, F. ; Di Venere, L. ; Do Souto Espiñeira, E. ; Dominis Prester, D. ; Donini, A. ; Doro, M. ; Fallah Ramazani, V. ; Fattorini, A. ; Ferrara, G. ; Fonseca, M. V. ; Font, L. ; Fruck, C. ; Fukami, S. ; García López, R. J. ; Garczarczyk, M. ; Gasparyan, S. ; Gaug, M. ; Giglietto, N. ; Giordano, F. ; Gliwny, P. ; Godinović, N. ; Green, J. G. ; Green, D. ; Hadasch, D. ; Hahn, A. ; Heckmann, L. ; Herrera, J. ; Hoang, J. ; Hrupec, D. ; Hütten, M. ; Inada, T. ; Inoue, S. ; Ishio, K. ; Iwamura, Y. ; Jiménez, I. ; Jormanainen, J. ; Jouvin, L. ; Kajiwara, Y. ; Karjalainen, M. ; Kerszberg, D. ; Kobayashi, Y. ; Kubo, H. ; Kushida, J. ; Lamastra, A. ; Lelas, D. ; Leone, F. ; Lindfors, E. ; Lombardi, S. ; Longo, F. ; López-Coto, R. ; López- Moya, M. ; López-Oramas, A. ; Loporchio, S. ; Machado de Oliveira Fraga, B. ; Maggio, C. ; Majumdar, P. ; Makariev, M. ; Mallamaci, M. ; Maneva, G. ; Manganaro, M. ; Maraschi, L. ; Mariotti, M. ; Martínez, M. ; Mazin, D. ; Menchiari, S. ; Mender, S. ; Mićanović, S. ; Miceli, D. ; Miener, T. ; Minev, M. ; Miranda, J. M. ; Mirzoyan, R. ; Molina, E. ; Moralejo, A. ; Morcuende, D. ; Moreno, V. ; Moretti, E. ; Neustroev, V. ; Nigro, C. ; Nilsson, K. ; Nishijima, K. ; Noda, K. ; Nozaki, S. ; Ohtani, Y. ; Oka, T. ; Otero-Santos, J. ; Paiano, S. ; Palatiello, M. ; Paneque, D. ; Paoletti, R. ; Paredes, J. M. ; Pavletić, L. ; Peñil, P. ; Perennes, C. ; Persic, M. ; Prada Moroni, P. G. ; Prandini, E. ; Priyadarshi, C. ; Puljak, I. ; Ribó, M. ; Rico, J. ; Righi, C. ; Rugliancich, A. ; Saha, L. ; Sahakyan, N. ; Saito, T. ; Sakurai, S. ; Satalecka, K. ; Saturni, F. G. ; Schmidt, K. ; Schweizer, T. ; Sitarek, J. ; Šnidarić, I. ; Sobczynska, D. ; Spolon, A. ; Stamerra, A. ; Strom, D. ; Strzys, M. ; Suda, Y. ; Surić, T. ; Takahashi, M. ; Tavecchio, F. ; Temnikov, P. ; Terzić, T. ; Teshima, M. ; Tosti, L. ; Truzzi, S. ; Tutone, A. ; Ubach, S. ; van Scherpenberg, J. ; Vanzo, G. ; Vazquez Acosta, M. ; Ventura, S. ; Verguilov, V. ; Vigorito, C. F. ; Vitale, V. ; Vovk, I. ; Will, M. ; Wunderlich, C. ; Zarić, D. ; Baack, D. ; Balbo, M. ; Biederbeck, N. ; Biland, A. ; Bretz, T. ; Buss, J. ; Dorner, D. ; Eisenberger, L. ; Elsaesser, D. ; Hildebrand, D. ; Iotov, R. ; Mannheim, K. ; Neise, D. ; Noethe, M. ; Paravac, A. ; Rhode, W. ; Schleicher, B. ; Sliusar, V. ; Walter, R. ; D’Ammando, F. ; Horan, D. ; Lien, A. Y. ; Baloković, M. ; Madejski, G. M. ; Perri, M. ; Verrecchia, F. ; Leto, C. ; Lähteenmäki, A. ; Tornikoski, M. ; Ramakrishnan, V. ; Järvelä, E. ; Vera, R. J. C. ; Chamani, W. ; Villata, M. ; Raiteri, C. M. ; Gupta, A. C. ; Pandey, A. ; Fuentes, A. ; Agudo, I. ; Casadio, C. ; Semkov, E. ; Ibryamov, S. ; Marchini, A. ; Bachev, R. ; Strigachev, A. ; Ovcharov, E. ; Bozhilov, V. ; Valcheva, A. ; Zaharieva, E. ; Damljanovic, G. ; Vince, O. ; Larionov, V. M. ; Borman, G. A. ; Grishina, T. S. ; Hagen-Thorn, V. A. ; Kopatskaya, E. N. ; Larionova, E. G. ; Larionova, L. V. ; Morozova, D. A. ; Nikiforova, A. A. ; Savchenko, S. S. ; Troitskiy, I. S. ; Troitskaya, Y. V. ; Vasilyev, A. A. ; Merkulova, O. A. ; Chen, W. P. ; Samal, M. ; Lin, H. C. ; Moody, J. W. ; Sadun, A. C. ; Jorstad, S. G. ; Marscher, A. P. ; Weaver, Z. R. ; Feige, M. ; Kania, J. ; Kopp, M. ; Kunkel, L. ; Reinhart, D. ; Scherbantin, A. ; Schneider, L. ; Lorey, C. ; Acosta-Pulido, J. A. ; Carnerero, M. I. ; Carosati, D. ; Kurtanidze, S. O. ; Kurtanidze, O. M. ; Nikolashvili, M. G. ; Chigladze, R. A. ; Ivanidze, R. Z. ; Kimeridze, G. N. ; Sigua, L. A. ; Joner, M. D. ; Spencer, M. ; Giroletti, M. ; Marchili, N. ; Righini, S. ; Rizzi, N. ; Bonnoli, G. ; FACT Collaboration ; Other groups and collaborations
MAGIC Collaboration
engleski
Investigation of the correlation patterns and the Compton dominance variability of Mrk 421 in 2017
Aims: We present a detailed characterisation and theoretical interpretation of the broadband emission of the paradigmatic TeV blazar Mrk 421, with a special focus on the multi-band flux correlations. Methods: The dataset has been collected through an extensive multi-wavelength campaign organised between 2016 December and 2017 June. The instruments involved are MAGIC, FACT, Fermi-LAT, Swift, GASP-WEBT, OVRO, Medicina, and Metsähovi. Additionally, four deep exposures (several hours long) with simultaneous MAGIC and NuSTAR observations allowed a precise measurement of the falling segments of the two spectral components. Results: The very-high-energy (VHE ; E > 100 GeV) gamma rays and X-rays are positively correlated at zero time lag, but the strength and characteristics of the correlation change substantially across the various energy bands probed. The VHE versus X-ray fluxes follow different patterns, partly due to substantial changes in the Compton dominance for a few days without a simultaneous increase in the X-ray flux (i.e., orphan gamma-ray activity). Studying the broadband spectral energy distribution (SED) during the days including NuSTAR observations, we show that these changes can be explained within a one-zone leptonic model with a blob that increases its size over time. The peak frequency of the synchrotron bump varies by two orders of magnitude throughout the campaign. Our multi-band correlation study also hints at an anti- correlation between UV-optical and X-ray at a significance higher than 3σ. A VHE flare observed on MJD 57788 (2017 February 4) shows gamma-ray variability on multi-hour timescales, with a factor ten increase in the TeV flux but only a moderate increase in the keV flux. The related broadband SED is better described by a two-zone leptonic scenario rather than by a one-zone scenario. We find that the flare can be produced by the appearance of a compact second blob populated by high energetic electrons spanning a narrow range of Lorentz factors, from γ'min=2×104 to γ'max=6×105.
galaxies: active ; BL Lacertae objects: individual: Mrk 421 ; radiation mechanisms: non-thermal ; Astrophysics - High Energy Astrophysical Phenomena
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