A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Multiwavelength behaviour of the blazar 3C 279: decade-long study from gamma-ray to radio
Tekijät: 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
Kustantaja: OXFORD UNIV PRESS
Julkaisuvuosi: 2020
Journal: Monthly Notices of the Royal Astronomical Society
Tietokannassa oleva lehden nimi: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Lehden akronyymi: MON NOT R ASTRON SOC
Vuosikerta: 492
Numero: 3
Aloitussivu: 3829
Lopetussivu: 3848
Sivujen määrä: 20
ISSN: 0035-8711
eISSN: 1365-2966
DOI: https://doi.org/10.1093/mnras/staa082
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/46519352
We report the results of decade-long (2008-2018) gamma-ray to 1 GHz radio monitoring of the blazar 3C 279, including GASP/WEBT, Fermi and Swift data, as well as polarimetric and spectroscopic data. The X-ray and gamma-ray light curves correlate well, with no delay greater than or similar to 3 h, implying general cospatiality of the emission regions. The gamma-ray optical flux flux relation changes with activity state, ranging from a linear to a more complex dependence. The behaviour of the Stokes parameters at optical and radio wavelengths, including 43 GHz Very Long Baseline Array images, supports either a predominantly helical magnetic field or motion of the radiating plasma along a spiral path. Apparent speeds of emission knots range from 10 to 37c, with the highest values requiring bulk Lorentz factors close to those needed to explain gamma-ray variability on very short time-scales, The Mg II emission line flux in the 'blue' and 'red' wings correlates with the optical synchrotron conlinuum flux density, possibly providing a variable source of seed photons for inverse Compton scattering. in the radio bands, we find progressive delays of the most prominent light-curve maxima with decreasing frequency, as expected from the frequency dependence of the tau = 1 surface of synchrotron self-absorption. The global maximum in the 86 GHz light. curve becomes less prominent at lower frequencies, while a local maximum, appearing in 2014, strengthens toward decreasing frequencies, becoming pronounced at similar to 5 GHz, These tendencies suggest. different Doppler boosting of stratified radio-emitting zones in the jet.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
