A1 Refereed original research article in a scientific journal
The long-lasting activity of 3C 454.3 GASP-WEBT and satellite observations in 2008-2010
Authors: Raiteri CM, Villata M, Aller MF, Gurwell MA, Kurtanidze OM, Lahteenmaki A, Larionov VM, Romano P, Vercellone S, Agudo I, Aller HD, Arkharov AA, Bach U, Benitez E, Berdyugin A, Blinov DA, Borisova EV, Bottcher M, Calle OJAB, Buemi CS, Calcidese P, Carosati D, Casas R, Chen WP, Efimova NV, Gomez JL, Gusbar C, Hawkins K, Heidt J, Hiriart D, Hsiao HY, Jordan B, Jorstad SG, Joshi M, Kimeridze GN, Koptelova E, Konstantinova TS, Kopatskaya EN, Kurtanidze SO, Larionova EG, Larionova LV, Leto P, Li Y, Ligustri R, Lindfors E, Lister M, Marscher AP, Molina SN, Morozova DA, Nieppola E, Nikolashvili MG, Nilsson K, Palma N, Pasanen M, Reinthal R, Roberts V, Ros JA, Roustazadeh P, Sadun AC, Sakamoto T, Schwartz RD, Sigua LA, Sillanpaa A, Takalo LO, Tammi J, Taylor B, Tornikoski M, Trigilio C, Troitsky IS, Umana G, Volvach A, Yuldasheva TA
Publisher: EDP SCIENCES S A
Publication year: 2011
Journal: Astronomy and Astrophysics
Journal name in source: ASTRONOMY & ASTROPHYSICS
Journal acronym: ASTRON ASTROPHYS
Article number: ARTN A87
Volume: 534
First page : 87
Last page: 102
Number of pages: 16
ISSN: 0004-6361
DOI: https://doi.org/10.1051/0004-6361/201117026(external)
Conclusions. We interpret the multifrequency behaviour in terms of an inhomogeneous curved jet, where synchrotron radiation of increasing wavelength is produced in progressively outer and wider jet regions, which can change their orientation in time. In particular, we assume that the long-term variability is due to this geometrical effect. By combining the optical and mm light curves to fit the gamma and X-ray ones, we find that the gamma (X-ray) emission may be explained by inverse-Comptonisation of synchrotron optical (IR) photons by their parent relativistic electrons (SSC process). A slight, variable misalignment between the synchrotron and Comptonisation zones would explain the increased gamma and X-ray flux levels in 2009-2010, as well as the change in the gamma/optical flux ratio during the outbursts peaks. The time delays of the X-ray flux changes after the gamma, and optical ones are consistent with the proposed scenario.
