Constraining the location of the emitting region in Fermi blazars through rapid γ-ray variability

被引：165
作者：
Tavecchio, F. [1 ]
Ghisellini, G. [1 ]
Bonnoli, G. [1 ]
Ghirlanda, G. [1 ]
机构：
[1] INAF Osservatorio Astron Brera, I-23807 Merate, Italy
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2010年 / 405卷 / 01期
关键词：
radiation mechanisms: non-thermal; galaxies: individual: 3C 454; 3; galaxies: individual: PKS 1510-089; galaxies: jets; gamma-rays: galaxies; HIGH-ENERGY EMISSION; LARGE-AREA TELESCOPE; QUASAR PKS 1510-089; SELF-COMPTON MODEL; BROAD-LINE REGION; EGRET DATA; INNER JET; 3C; 279; RADIATION; SPECTRUM;
D O I：
10.1111/j.1745-3933.2010.00867.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We consider the 1.5-yr Fermi/Large Area Telescope (LAT) light curves (E > 100 MeV) of the flat spectrum radio quasars 3C 454.3 and PKS 1510-089, which show high activity in this period of time. We characterize the duty cycle of the source by comparing the time spent by the sources at different flux levels. We consider in detail the light curves covering periods of extreme flux. The large number of high-energy photons collected by LAT in these events allows us to find evidence of variability on time-scales of a few hours. We discuss the implications of significant variability on such short time-scales that challenge the scenario recently advanced in which the bulk of the gamma-ray luminosity is produced in regions of the jet at large distances (tens of parsec) from the black hole.
引用
收藏
页码：L94 / L98
页数：5
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