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A GENERAL RELATIVISTIC EXTERNAL COMPTON-SCATTERING MODEL FOR TeV EMISSION FROM M87
Cui, YD; Yuan, YF; Li YR(李彦荣); 王建民;Li, YR; Wang, JM
2012
发表期刊ASTROPHYSICAL JOURNAL
卷号746期号:2页码:177
摘要M87 is the first detected non-blazar extragalactic tera-electron-volt (TeV) source with rapid variation and a very flat spectrum in the TeV band. To explain the two peaks in the spectral energy distribution of the nucleus of M87, which is similar to that of blazars, the most commonly adopted models are the synchrotron self-Compton-scattering models and the external inverse Compton (EIC) scattering models. Considering that there is no correlated variation in the soft band (from radio to X-ray) matching the TeV variation and that the TeV sources should not suffer from gamma gamma absorption due to the flat TeV spectrum, the EIC models are advantageous in modeling the TeV emission from M87. In this paper, we propose a self-consistent EIC model to explain the flat TeV spectrum of M87 within the framework of fully general relativity, where the background soft photons are from the advection-dominated accretion flow around the central black hole, and the high-energy electrons are from the mini-jets that are powered by the magnetic reconnection in the main jet. In our model, both the TeV flares observed in the years 2005 and 2008 could be well explained: the gamma gamma absorption for TeV photons is very low, even inside the region very close to the black hole 20R(g) similar to 50R(g); at the same region, the average EIC cooling time (similar to 10(2) similar to 10(3) s) is short, which is consistent with the observed timescale of the TeV variation. Furthermore, we also discuss the possibility that the accompanying X-ray flare in 2008 is due to the direct synchrotron radiation of the mini-jets.
关键词black hole physics galaxies: individual (M87)
学科领域Astronomy & Astrophysics
DOI10.1088/0004-637X/746/2/177
收录类别SCI
WOS记录号WOS:000300406300063
引用统计
被引频次:10[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224439
专题粒子天体物理中心
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GB/T 7714
Cui, YD,Yuan, YF,Li YR,et al. A GENERAL RELATIVISTIC EXTERNAL COMPTON-SCATTERING MODEL FOR TeV EMISSION FROM M87[J]. ASTROPHYSICAL JOURNAL,2012,746(2):177.
APA Cui, YD,Yuan, YF,李彦荣,王建民;Li, YR,&Wang, JM.(2012).A GENERAL RELATIVISTIC EXTERNAL COMPTON-SCATTERING MODEL FOR TeV EMISSION FROM M87.ASTROPHYSICAL JOURNAL,746(2),177.
MLA Cui, YD,et al."A GENERAL RELATIVISTIC EXTERNAL COMPTON-SCATTERING MODEL FOR TeV EMISSION FROM M87".ASTROPHYSICAL JOURNAL 746.2(2012):177.
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