Estimating black hole masses in young radio sources using CFHT spectroscopy

	Estimating black hole masses in young radio sources using CFHT spectroscopy
	Gu, M. F.1; Pak, S.2; Ho, L. C.3
刊名	ASTRONOMISCHE NACHRICHTEN
	2009-03-01
卷号	330 期号:2-3 页码:253-256
关键词	black hole physics galaxies: active galaxies: compact galaxies: evolution quasars: absorption lines
英文摘要	The correlation between black hole masses and stellar velocity dispersions provides an efficient method to determine the masses of black holes in active galaxies. We obtained optical spectra of a Compact-Steep-Spectrum (CSS) galaxy 4C+29.70, using the Canada-France-Hawaii Telescope (CFHT) equipped with OSIS, in 2003 August 6. Several stellar absorption features, such as Mg I (5175 angstrom), Ca E band (5269 angstrom) and Na D (5890 angstrom), were detected in the spectra. The stellar velocity dispersion, sigma, of the host galaxy, measured from absorption features is approximate to 250 km s(-1). If 4C +29.70 follows the M(BH)-sigma relation established for nearby galaxies, then its central black hole has a mass of approximate to 3.3 x 10(8) M(circle dot). In combination with the black hole masses of seven GPS galaxies in Snellen et al. (2003), we find that the average black hole mass of these eight young radio sources is smaller than that of the Bettoni et al. (2003) sample of extended radio galaxies. This may indicate that young radio sources are likely at the early evolutionary stage of radio galaxies, at which the central black holes may still undergo rapid growth. However, this needs further investigations. (C) 2009 WILEY-VCH Verlag GmbH & Co, KGaA, Weinheim
学科主题	星系与宇宙学研究中心
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 ; COMPACT STEEP-SPECTRUM ; VELOCITY DISPERSION ; STAR-FORMATION ; GALAXIES ; CONNECTION ; ACCRETION ; CLUSTERS ; QUASARS ; LINERS
收录类别	SCI ; ISTP
语种	英语
WOS记录号	WOS:000264306600034
公开日期	2010-11-08
内容类型	期刊论文
源URL	[http://119.78.226.72//handle/331011/12625]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 2.Kyung Hee Univ, Dept Astron & Space Sci, Yongin 446701, Gyeonggi Do, South Korea 3.Observ Carnegie Inst Washington, Pasadena, CA 91101 USA
推荐引用方式 GB/T 7714	Gu, M. F.,Pak, S.,Ho, L. C.. Estimating black hole masses in young radio sources using CFHT spectroscopy[J]. ASTRONOMISCHE NACHRICHTEN,2009,330(2-3):253-256.
APA	Gu, M. F.,Pak, S.,&Ho, L. C..(2009).Estimating black hole masses in young radio sources using CFHT spectroscopy.ASTRONOMISCHE NACHRICHTEN,330(2-3),253-256.
MLA	Gu, M. F.,et al."Estimating black hole masses in young radio sources using CFHT spectroscopy".ASTRONOMISCHE NACHRICHTEN 330.2-3(2009):253-256.