Photometry of three gamma-ray-loud quasars and implications for supermassive black holes

	Photometry of three gamma-ray-loud quasars and implications for supermassive black holes
	Xie GZ(谢光中)1,2,3 ; Liang EW(梁恩维)1,2,4 ; Zhou SB(周曙白)1,2,3 ; Li KH(李开华)1,2 ; Dai BZ(戴本忠)1,2,3 ; Ma L(马力)1,2,5
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2002-08
卷号	334 期号:2 页码:459-470
关键词	black hole physics galaxies : active galaxies : nuclei galaxies : photometry quasars : general
ISSN号	0035-8711
通讯作者	Xie, GZ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	The results of photometry of three gamma-ray-loud quasars, PKS 1510-089, 3C 279 and OJ248, during 2001 in the B, V and R bands and implications for the supermassive black hole (SMBH) model in these objects are presented. The results show that the three quasars had significant, but irregular, rapid outbursts with a typical time-scale of about 40-60 min and a typical amplitude of about Deltam similar or equal to0.60-1.26 mag during the observations. For 3C 279 and OJ248 the upper limits of the masses of SMBHs are estimated from the observed minimum optical variability time-scale, and the lower limits are also estimated by a method proposed by Dermer & Gehrels. The masses derived from both methods are reasonable. For PKS 1510-089 a new brightness minima was also observed. Analysing the observations from 1999 to 2001, three minima were observed. Although their light curves are poorly sampled, it is intriguing to note that these minimum at intervals of about 43 min seem to indicate the possibility of a periodic phenomenon. So a hypothesis is proposed to interpret the phenomenon, suggesting that there is a binary black hole system at the centre. The parameters of the system are estimated by a very simple method. The periodicity is about 336+/-14 d in the observed frame; the masses of the primary and secondary black holes are 10(8.0) and 10(6.2) M-circle dot, respectively; the distance between two black holes is 10(15.81) cm (378R (g) of the primary black hole), and the lifetime of the system is 10(6.0) yr. These results seem to indicate that PKS 1510-089 is another possible candidate binary black hole system. It should be monitored in future to obtain more data for further analysis to test the hypothesis.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	ACTIVE GALACTIC NUCLEI ; BL-LACERTAE OBJECTS ; RADIO-SOURCES ; BLAZARS ; VARIABILITY ; RADIATION ; OJ-287 ; JET ; MARKARIAN-421 ; PRECESSION
收录类别	SCI
原文出处	http://mnras.oxfordjournals.org/content/334/2/459
语种	英语
WOS记录号	WOS:000177258500024
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6949]
专题	云南天文台_星系研究组
作者单位	1.Yunnan Observatory, National Astronomical Observatories, Chinese Academy of Sciences, PO Box 110, Kunming 650011, China 2.United Laboratory of Optical Astronomy, Chinese Academy of Sciences 3.Yunnan Astrophysics Center, Yunnan University, Kunming 650091, China 4.Physics Department, Guangxi University, Nanning, Guangxi 530004, China 5.Physics Department, Yunnan Normal University, Kunming 650092, China
推荐引用方式 GB/T 7714	Xie GZ,Liang EW,Zhou SB,et al. Photometry of three gamma-ray-loud quasars and implications for supermassive black holes[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2002,334(2):459-470.
APA	Xie GZ,Liang EW,Zhou SB,Li KH,Dai BZ,&Ma L.(2002).Photometry of three gamma-ray-loud quasars and implications for supermassive black holes.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,334(2),459-470.
MLA	Xie GZ,et al."Photometry of three gamma-ray-loud quasars and implications for supermassive black holes".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 334.2(2002):459-470.