Synchrotron self-Compton model for PKS 2155-304

被引：10

作者：

Kusunose, Masaaki ^{[1
]}

Takahara, Fumio ^{[2
]}

机构：

[1] Kwansei Gakuin Univ, Sch Sci & Technol, Dept Phys, Sanda 6691337, Japan

[2] Osaka Univ, Grad Sch Sci, Dept Earth & Space Sci, Toyonaka, Osaka 5600043, Japan

来源：

ASTROPHYSICAL JOURNAL | 2008年 / 682卷 / 02期

关键词：

BL Lacertae objects : individual (PKS 2155-304); galaxies : active; radiation mechanisms : nonthermal;

D O I：

10.1086/589233

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

H.E.S.S. observed TeV blazar PKS 2155-304 in a strong flare state in 2006 July. The TeV flux varied on timescale as short as a few minutes, which sets strong constraints on the properties of the emission region. By use of the synchrotron self-Compton model, we found that models with the bulk Lorentz factor similar to 100, the size of the emission region similar to 10(15) cm, and magnetic field similar to 0.1 G explain the observed spectral energy distribution and the flare timescale of similar to a few minutes. This model with a large value of Gamma accounts for the emission spectrum not only in the TeV band but also in the X-ray band. The major cooling process of electrons/positrons in the jet is inverse Compton scattering off synchrotron photons. The energy content of the jet is highly dominated by particle kinetic energy over magnetic energy.

引用

页码：784 / 788

页数：5

共 50 条

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