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Masses, dimensionless Kerr parameters, and emission regions in GeV gamma-ray-loud blazars
Xie GZ(谢光中)1,2,3; Ma L(马力)1,3,4; Liang EW(梁恩维)1,4,5; Zhou SB(周曙白)1,2,4; Xie, ZH3; Xie, GZ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊ASTRONOMICAL JOURNAL
2003-11
卷号126期号:5页码:2108-2113
DOI10.1086/378597
产权排序第1完成单位
收录类别SCI
关键词Black Hole Physics Bl Lacertae Objects Galaxies : Active Galaxies : Nuclei
摘要We have compiled sample of 17 GeV gamma-ray-loud blazars, for which rapid optical variability and gamma-ray fluxes are well observed, from the literature. We derive estimates of the masses, the minimum Kerr parameters a(min), and the size of the emission regions of the supermassive black holes (SMBHs) for the blazars in the sample from their minimum optical variability timescales and gamma-ray fluxes. The results show that (1) the masses derived from the optical variability timescale (M(H)) are significantly correlated with the masses from the gamma-ray luminosity (M(H)(KN)); (2) the values of a(min) of the SMBHs with masses M(H)greater than or equal to10(8.3) M(circle dot)(three out of 17 objects) range from similar to0.5 to similar to1.0, suggesting that these SMBHs are likely to be Kerr black holes. For the SMBHs with M(H)<10(8.3) M(circle dot), however, a(min)=0, suggesting that a nonrotating black hole model cannot be ruled out for these objects. In addition, the values of the size of the emission region, r*, for the two kinds of SMBHs are significantly different. For the SMBHs with a(min)>0, the sizes of the emission regions are almost within the horizon (2r(G)) and marginally bound orbit (4r(G)), while for those with a(min)=0 they are in the range (4.3-66.4)r(G), extending beyond the marginally stable orbit (6r(G)). These results may imply that (1) the rotational state, the radiating regions, and the physical processes in the inner regions for the two kinds of SMBH are significantly different and ( 2) the emission mechanisms of GeV gamma-ray blazars are related to the SMBHs in their centers but are not related to the two different kinds of SMBH.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
归档日期2003-12-11
WOS记录号WOS:000186494200002
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]SUPERMASSIVE BLACK-HOLES ; BL-LACERTAE OBJECTS ; RAPID OPTICAL VARIABILITY ; ACTIVE GALACTIC NUCLEI ; GALAXIES ; QUASARS ; SEARCH ; ENERGY
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6958
专题星系研究组
通讯作者Xie, GZ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.Yunnan Observatory, National Astronomical Observatories, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
2.Yunnan Astrophysics Center, Department of Physics, Yunnan University, 650091 Kunming, China
3.Department of Physics, Yunnan Normal University, Kunming 650092, China
4.Graduate School of the Chinese Academy of Sciences
5.Department of Physics, Guangxi University, 530004 Guangxi, China
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GB/T 7714
Xie GZ,Ma L,Liang EW,et al. Masses, dimensionless Kerr parameters, and emission regions in GeV gamma-ray-loud blazars[J]. ASTRONOMICAL JOURNAL,2003,126(5):2108-2113.
APA Xie GZ,Ma L,Liang EW,Zhou SB,Xie, ZH,&Xie, GZ .(2003).Masses, dimensionless Kerr parameters, and emission regions in GeV gamma-ray-loud blazars.ASTRONOMICAL JOURNAL,126(5),2108-2113.
MLA Xie GZ,et al."Masses, dimensionless Kerr parameters, and emission regions in GeV gamma-ray-loud blazars".ASTRONOMICAL JOURNAL 126.5(2003):2108-2113.
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