Modelling rapid TeV variability of PKS 2155-304

被引：24

作者：

Katarzynski, K. ^{[1
]}

Lenain, J. -P. ^{[2
]}

Zech, A. ^{[2
]}

Boisson, C. ^{[2
]}

Sol, H. ^{[2
]}

机构：

[1] Nicholas Copernicus Univ, Torun Ctr Astron, PL-87100 Torun, Poland

[2] Univ Paris Diderot, LUTH, Observ Paris, CNRS, F-92190 Meudon, France

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2008年 / 390卷 / 01期

关键词：

radiative transfer; BL Lacertae objects: individual: PKS 2155-304;

D O I：

10.1111/j.1365-2966.2008.13753.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present theoretical modelling for the very rapid TeV variability of PKS 2155-304 observed recently by the High Energy Spectroscopic System (HESS) experiment. To explain the light curve, where at least five flaring events were well observed, we assume five independent components of a jet that are characterized by slightly different physical parameters. An additional, significantly larger component is used to explain the emission of the source at long time-scales. This component dominates the emission in the X-ray range, whereas the other components are dominant in the TeV range. The model used for our simulation describes precisely the evolution of the particle energy spectrum inside each component and takes into account light travel time effects. We show that a relatively simple synchrotron self-Compton scenario may explain this very rapid variability. Moreover, we find that absorption of the TeV emission inside the components due to the pair creation process is negligible.

引用

页码：371 / 376

页数：6

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