Estimating black hole masses of AGNs using ultraviolet emission line properties

	Estimating black hole masses of AGNs using ultraviolet emission line properties
	Kong, Min-Zhi ; Wu, Xue-Bing ; Wang, Ran ; Han, Jin-Lin
刊名	CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
	2006
卷号	6 期号:4 页码:396-410
关键词	galaxies : nucleus galaxies : high-redshift quasars : emission lines ultraviolet : galaxies
英文摘要	Based on measured broad line region sizes in the reverberation-mapping AGN sample, two new empirical relations are introduced to estimate the central black hole masses of radio-loud high-redshift (z > 0.5) AGNs. First, using the archival IUE/HST spectroscopy data at UV band for the reverberation-mapping objects, we obtained two new empirical relations between the BLR size and Mg II/C IV emission line luminosity. Secondly, using the newly determined black hole masses of the reverberation-mapping sample as calibration, we found two new relationships for determining the black hole mass with the full width at half maximum and the luminosity of Mg II/C IV line. We then apply the relations to estimate the black hole masses of the AGNs in the Large Bright Quasar Survey and a sample of radio-loud quasars. For the objects with small radio-loudness, the black hole mass estimated using the R-BLR-L-Mg II/C IV relation is, consistent with that from the R-BLR-L-3000 angstrom/1350 angstrom relation. For radio-loud AGNs, however, the mass estimated from the R-BLR-L-Mg II/C IV relation is systematically lower than that from the continuum luminosity L (3000 angstrom/1350 angstrom). Because jets could have significant contributions to the UV/optical continuum luminosity of radio-loud AGNs, we emphasize once again that for radio-loud AGNs, the emission line luminosity may be a better tracer of the ionizing luminosity than the continuum luminosity, so that the relations between the BLR size and UV emission line luminosities should be used to estimate the black hole masses of. high redshift radio-loud AGNs.
收录类别	SCI
语种	英语
WOS记录号	WOS:000239902800002
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/7055]
专题	国家天文台_射电天文研究部
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Kong, Min-Zhi,Wu, Xue-Bing,Wang, Ran,et al. Estimating black hole masses of AGNs using ultraviolet emission line properties[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2006,6(4):396-410.
APA	Kong, Min-Zhi,Wu, Xue-Bing,Wang, Ran,&Han, Jin-Lin.(2006).Estimating black hole masses of AGNs using ultraviolet emission line properties.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,6(4),396-410.
MLA	Kong, Min-Zhi,et al."Estimating black hole masses of AGNs using ultraviolet emission line properties".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 6.4(2006):396-410.