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Variability and beaming of GeV gamma-ray-loud blazars
Xie GZ(谢光中)1,2; Ma L(马力)1,3,4; Zhou SB(周曙白)1,2,3; Chen LE(陈洛恩)1,3,5; Xie, ZH4; Xie, GZ (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2003
卷号55期号:5页码:933-937
DOI10.1093/pasj/55.5.933
产权排序第1完成单位
收录类别SCI
关键词Black Holes Blazars : General Galaxies : Active Galaxies : General Gamnia-rays : Klein-nishina Effects Observations
摘要Considering the Klein-Nishina effects for high-energy gamma-ray emissions, we derived a corrected form of the basic Elliot-Shapiro formula. Two new lower limits to the time scales of the variability expected from an accreting Schwarzschild black hole and Kerr black hole were derived, respectively. For a sample of 25 GeV gamma-ray-loud blazars known to have the shortest time scales of flux variability, t(min), we studied the corrected Elliot-Shapiro relations between t(min) and the GeV gamma-ray luminosities in both the high and low states, respectively. We observe that: (1) No sources have been observed to have GeV gamma-ray luminosities in the low state above the corrected Eddington limit being produced by a Kerr black hole and a Schwarzschild black hole. (2) Only one source has been observed to have a luminosity in the high state above the corrected Eddington limit being produced by a Kerr black hole and a Schwarzschild black hole, which is a new argument for not invoking relativistic beaming models for the present EGRET observational data alone. Our conclusion is that if one considers the Klein-Nishina effect, the evidence for beamed emission from the present gamma-ray data alone is weak. Obviously, our conclusion is consistent with that of Dermer and Gehrels (1995, ApJ, 447, 103), but it is a new independent evidence.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6264
URL查看原文
归档日期2003-12-11
WOS记录号WOS:000186281000007
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]BL-LACERTAE OBJECTS ; ACTIVE GALACTIC NUCLEI ; SUPERMASSIVE BLACK-HOLES ; TIME-SCALES ; EMISSION ; SEARCH ; MASSES ; RADIO ; LAC
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6965
专题星系研究组
通讯作者Xie, GZ (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P. O. Box 110, Kunming 650011, P. R. China
2.Yunnan Astrophysics Center, Physics Department, Yunnan University, Kunming 650091, P. R. China
3.The Graduate School of The Chinese Academy of Sciences
4.Physics Department, Yunnan Normal University, Kunming 650092, P. R. China
5.Physics Department, Yuxi Normal College, Yuxi 653100, P. R. China
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Xie GZ,Ma L,Zhou SB,et al. Variability and beaming of GeV gamma-ray-loud blazars[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2003,55(5):933-937.
APA Xie GZ,Ma L,Zhou SB,Chen LE,Xie, ZH,&Xie, GZ .(2003).Variability and beaming of GeV gamma-ray-loud blazars.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,55(5),933-937.
MLA Xie GZ,et al."Variability and beaming of GeV gamma-ray-loud blazars".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 55.5(2003):933-937.
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