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 |
DOI | 10.1086/378597 |
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 |
ISSN | 0004-6256 |
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 |
引用统计 | |
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 |
第一作者单位 | 中国科学院云南天文台 |
推荐引用方式 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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