摘要
PKS2155-304是一个典型的TeV源,在全波段都观测到光变.文章利用GeVγ辐射和X辐射观测资料确定GeVγ辐射的基本参量以及相关黑洞质量,利用光学光变周期分析中心双黑洞系统的结构参量,并利用TeV的光变时标确定TeV辐射的区域大小以及离中心的距离.从分析得到如下结论:①在中心有一个双黑洞系统,大黑洞的质量是80.8×107太阳质量,而次黑洞的质量为(3.35-5.20)×107太阳质量.该双黑洞系统的半轴和为(3.67-5.15)×1016cm.②GeVγ辐射的参量与因子来自于离中心黑洞(次黑洞)18～20斯瓦西半径处.GeVγ辐射的Doppler因子为0.31～0.45,视角为8.5°～9.4°.这里的两个值分别对应于不同的系数λ.③TeVγ辐射来自于距中心2.5～2.8斯瓦西半径处.
PKS 2155-304 is a typical TeV source.It shows variabilities not only in the optical region,but also in the extreme high gamma-ray region.In this work,the GeV γ-ray and X-ray emissions are used to determine the basic parameters for the secondary black hole,the optical variation period is used to determine the central structure parameters of the source,and the very rapid TeV γ-ray variation is used to determine the location of the TeV γ-ray emissions.From our calculations,following results are obtained.① There is a binary black hole system at the center with the primary black hole being 80.8×107 M⊙ and the secondary black hole being（3.35 to 5.20） ×107 M⊙.The binary black hole system with semi-major axes r=a1＋a2=（3.67-5.15）×1016 cm.②The GeV emissions are produced in a distance of 18 to 20 Schwarzschild radii（Rg） from the center of the secondary black hole.Its boosting factors are 0.31 to 0.45,the propagation angles are Φ is 8.5° to 9.4° to the line of sight for λ=1.0 and 0.1 respectively.③The TeV emissions are from a region of 2.5 to 2.8 Rg.
出处
《广州大学学报（自然科学版）》
CAS
2012年第2期18-22,共5页
Journal of Guangzhou University:Natural Science Edition
基金
Supported by the National Natural Science Foundation of China(10633010,11173009)
the 973 programme (2007CB815405)
the Bureau of Education of Guangzhou Municipality(No.11 Sui-Jiao-Ke[2009])
Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme(GDUPS)(2009)
Yangcheng Scholar Funded Scheme(10A027S)
the Joint Laboratory for Optical Astronomy of Chinese Academy of Sciences
