DEPENDENCE OF THE OPTICAL/ULTRAVIOLET VARIABILITY ON THE EMISSION-LINE PROPERTIES AND EDDINGTON RATIO IN ACTIVE GALACTIC NUCLEI

	DEPENDENCE OF THE OPTICAL/ULTRAVIOLET VARIABILITY ON THE EMISSION-LINE PROPERTIES AND EDDINGTON RATIO IN ACTIVE GALACTIC NUCLEI
	Ai YL(艾艳丽)1,2,3 ; Yuan WM(袁为民)1,2 ; Zhou, HY 4,5; Wang, TG 4,5; Dong, XB4,5 ; Wang JG(王建国)1,2,3 ; Lu, HL 4,5
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2010-06-10
卷号	716 期号:1 页码:L31-L35
关键词	galaxies: active galaxies: Seyfert quasars: general techniques: photometric
ISSN号	2041-8205
通讯作者	Ai, YL (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Yunnan, Peoples R China.
产权排序	第一完成单位
英文摘要	The dependence of the long-term optical/UV variability on the spectral and fundamental physical parameters for radio-quiet active galactic nuclei (AGNs) is investigated. The multi-epoch-repeated photometric scanning data in the Stripe-82 region of the Sloan Digital Sky Survey (SDSS) are exploited for two comparative AGN samples (mostly quasars) selected therein: a broad-line Seyfert 1 (BLS1) type sample and a narrow-line Seyfert 1 (NLS1) type AGN sample within redshifts 0.3-0.8. Their spectral parameters are derived from the SDSS spectroscopic data. It is found that on rest-frame timescales of several years the NLS1-type AGNs show systematically smaller variability compared to the BLS1-type AGNs. In fact, the variability amplitude is found to correlate, though only moderately, with the eigenvector 1 parameters, i.e., the smaller the H beta linewidth, the weaker the [O III] and the stronger the Fe II emission, the smaller the variability amplitude. Moreover, an interesting inverse correlation is found between the variability and the Eddington ratio, which is perhaps more fundamental. The previously known dependence of the variability on luminosity is not significant, and the dependence on black hole mass-as claimed in recent papers and also present in our data-fades out when controlling for the Eddington ratio in the correlation analysis, though these may be partly due to the limited ranges of luminosity and black hole mass of our samples. Our result strongly supports that an accretion disk is likely to play a major role in producing the optical/UV variability.
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]	DIGITAL SKY SURVEY ; BLACK-HOLE MASS ; TERM OPTICAL VARIABILITY ; X-RAY VARIABILITY ; QUASAR VARIABILITY ; SEYFERT-1 GALAXIES ; RADIO-LOUD ; AGN
收录类别	SCI
原文出处	http://iopscience.iop.org/2041-8205/716/1/L31/
语种	英语
WOS记录号	WOS:000278591900008
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4996]
专题	云南天文台_高能天体物理研究组云南天文台_中国科学院天体结构与演化重点实验室
作者单位	1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, Yunnan, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, Yunnan, China 3.Graduate School of the Chinese Academy of Sciences, 19A Yuquan Road, P.O. Box 3908, Beijing 100039, China 4.Center for Astrophysics, University of Science and Technology of China, Hefei, Anhui 230026, China 5.Joint Institute of Galaxies and Cosmology, SHAO, and USTC, China
推荐引用方式 GB/T 7714	Ai YL,Yuan WM,Zhou, HY,et al. DEPENDENCE OF THE OPTICAL/ULTRAVIOLET VARIABILITY ON THE EMISSION-LINE PROPERTIES AND EDDINGTON RATIO IN ACTIVE GALACTIC NUCLEI[J]. ASTROPHYSICAL JOURNAL LETTERS,2010,716(1):L31-L35.
APA	Ai YL.,Yuan WM.,Zhou, HY.,Wang, TG.,Dong, XB.,...&Lu, HL.(2010).DEPENDENCE OF THE OPTICAL/ULTRAVIOLET VARIABILITY ON THE EMISSION-LINE PROPERTIES AND EDDINGTON RATIO IN ACTIVE GALACTIC NUCLEI.ASTROPHYSICAL JOURNAL LETTERS,716(1),L31-L35.
MLA	Ai YL,et al."DEPENDENCE OF THE OPTICAL/ULTRAVIOLET VARIABILITY ON THE EMISSION-LINE PROPERTIES AND EDDINGTON RATIO IN ACTIVE GALACTIC NUCLEI".ASTROPHYSICAL JOURNAL LETTERS 716.1(2010):L31-L35.