OUTFLOW AND HOT DUST EMISSION IN BROAD ABSORPTION LINE QUASARS

	OUTFLOW AND HOT DUST EMISSION IN BROAD ABSORPTION LINE QUASARS
	Zhang, Shaohua 1; Wang, Huiyuan 2; Wang, Tinggui 2; Xing, Feijun 2; Zhang, Kai 3; Zhou, Hongyan 1,2; Jiang, Peng 2
刊名	ASTROPHYSICAL JOURNAL
	2014-05-01
卷号	786 期号:1 页码:1
关键词	dust galaxies: nuclei infrared: galaxies quasars: absorption lines quasars: general extinction
英文摘要	We have investigated a sample of 2099 broad absorption line (BAL) quasars with z = 1.7-2.2 built from the Sloan Digital Sky Survey Data Release Seven and the Wide-field Infrared Survey. This sample is collected from two BAL quasar samples in the literature and is refined by our new algorithm. Correlations of outflow velocity and strength with a hot dust indicator (beta(NIR)) and other quasar physical parameters-such as an Eddington ratio, luminosity, and a UV continuum slope-are explored in order to figure out which parameters drive outflows. Here beta(NIR) is the near-infrared continuum slope, which is a good indicator of the amount of hot dust emission relative to the accretion disk emission. We confirm previous findings that outflow properties moderately or weakly depend on the Eddington ratio, UV slope, and luminosity. For the first time, we report moderate and significant correlations of outflow strength and velocity with beta(NIR) in BAL quasars. It is consistent with the behavior of blueshifted broad emission lines in non-BAL quasars. The statistical analysis and composite spectra study both reveal that outflow strength and velocity are more strongly correlated with beta(NIR) than the Eddington ratio, luminosity, and UV slope. In particular, the composites show that the entire C iv absorption profile shifts blueward and broadens as beta(NIR) increases, while the Eddington ratio and UV slope only affect the high and low velocity part of outflows, respectively. We discuss several potential processes and suggest that the dusty outflow scenario, i.e., that dust is intrinsic to outflows and may contribute to the outflow acceleration, is most likely.
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 ; DIGITAL SKY SURVEY ; ULTRAVIOLET SPECTRAL EVIDENCE ; BLACK-HOLE MASSES ; DATA RELEASE ; X-RAY ; ENERGY-DISTRIBUTIONS ; SEYFERT-1 GALAXIES ; STELLAR OBJECTS ; OBSERVABLE PROPERTIES
收录类别	SCI
语种	英语
WOS记录号	WOS:000335810700042
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/18179]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Polar Res Inst China, Shanghai 200136, Peoples R China 2.Chinese Acad Sci, Univ Sci & Technol China, Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Shaohua,Wang, Huiyuan,Wang, Tinggui,et al. OUTFLOW AND HOT DUST EMISSION IN BROAD ABSORPTION LINE QUASARS[J]. ASTROPHYSICAL JOURNAL,2014,786(1):1.
APA	Zhang, Shaohua.,Wang, Huiyuan.,Wang, Tinggui.,Xing, Feijun.,Zhang, Kai.,...&Jiang, Peng.(2014).OUTFLOW AND HOT DUST EMISSION IN BROAD ABSORPTION LINE QUASARS.ASTROPHYSICAL JOURNAL,786(1),1.
MLA	Zhang, Shaohua,et al."OUTFLOW AND HOT DUST EMISSION IN BROAD ABSORPTION LINE QUASARS".ASTROPHYSICAL JOURNAL 786.1(2014):1.