ESTIMATING BLACK HOLE MASSES IN ACTIVE GALACTIC NUCLEI USING THE Mg II lambda 2800 EMISSION LINE

	ESTIMATING BLACK HOLE MASSES IN ACTIVE GALACTIC NUCLEI USING THE Mg II lambda 2800 EMISSION LINE
	Wang JG(王建国)1,2,3,4 ; Dong, XB2,5 ; Wang, TG 2,5; Ho, LC 6; Yuan WM(袁为民)1 ; Wang, HY 2,5; Zhang, K 2,5; Zhang, SH 2,5; Zhou, HY 2,5
刊名	ASTROPHYSICAL JOURNAL
	2009-12-20
卷号	707 期号:2 页码:1334-1346
关键词	black hole physics galaxies: active quasars: emission lines quasars: general
ISSN号	0004-637X
通讯作者	Wang, JG (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Yunnan, Peoples R China.
产权排序	第一完成单位
英文摘要	We investigate the relationship between the linewidths of broad Mg II lambda 2800 and H beta in active galactic nuclei (AGNs) to refine them as tools to estimate black hole (BH) masses. We perform a detailed spectral analysis of a large sample of AGNs at intermediate redshifts selected from the Sloan Digital Sky Survey, along with a smaller sample of archival ultraviolet spectra for nearby sources monitored with reverberation mapping (RM). Careful attention is devoted to accurate spectral decomposition, especially in the treatment of narrow-line blending and Fe II contamination. We show that, contrary to popular belief, the velocity width of Mg II tends to be smaller than that of H beta, suggesting that the two species are not cospatial in the broad-line region. Using these findings and recently updated BH mass measurements from RM, we present a new calibration of the empirical prescriptions for estimating virial BH masses for AGNs using the broad Mg II and H beta lines. We show that the BH masses derived from our new formalisms show subtle but important differences compared to some of the mass estimators currently used in the literature.
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 ; RADIUS-LUMINOSITY RELATIONSHIP ; HOST-GALAXY STARLIGHT ; HIGH-REDSHIFT QUASARS ; VELOCITY DISPERSION ; EDDINGTON RATIO ; SEYFERT-1 GALAXIES ; RADIATION PRESSURE ; INTRINSIC SCATTER ; ASTRONOMICAL DATA
收录类别	SCI
原文出处	http://iopscience.iop.org/0004-637X/707/2/1334/
语种	英语
WOS记录号	WOS:000272465400040
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4970]
专题	云南天文台_高能天体物理研究组
作者单位	1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming, Yunnan 650011, China 2.Key Laboratory for Research in Galaxies and Cosmology, The University of Sciences and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026, China 3.Department of Physics, Yunnan University, Kunming, Yunnan 650031, China 4.Graduate School of the Chinese Academy of Sciences, 19A Yuquan Road, P.O. Box 3908, Beijing 100039, China 5.Center for Astrophysics, University of Science and Technology of China, Hefei, Anhui 230026, China 6.The Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101, USA
推荐引用方式 GB/T 7714	Wang JG,Dong, XB,Wang, TG,et al. ESTIMATING BLACK HOLE MASSES IN ACTIVE GALACTIC NUCLEI USING THE Mg II lambda 2800 EMISSION LINE[J]. ASTROPHYSICAL JOURNAL,2009,707(2):1334-1346.
APA	Wang JG.,Dong, XB.,Wang, TG.,Ho, LC.,Yuan WM.,...&Zhou, HY.(2009).ESTIMATING BLACK HOLE MASSES IN ACTIVE GALACTIC NUCLEI USING THE Mg II lambda 2800 EMISSION LINE.ASTROPHYSICAL JOURNAL,707(2),1334-1346.
MLA	Wang JG,et al."ESTIMATING BLACK HOLE MASSES IN ACTIVE GALACTIC NUCLEI USING THE Mg II lambda 2800 EMISSION LINE".ASTROPHYSICAL JOURNAL 707.2(2009):1334-1346.