OUTFLOW AND HOT DUST EMISSION IN HIGH-REDSHIFT QUASARS

	OUTFLOW AND HOT DUST EMISSION IN HIGH-REDSHIFT QUASARS
	Wang, Huiyuan 1; Xing, Feijun 1; Zhang, Kai 2; Wang, Tinggui 1; Zhou, Hongyan 1,3; Zhang, Shaohua 3
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2013-10-10
卷号	776 期号:1 页码:1
关键词	dust galaxies: nuclei infrared: galaxies quasars: emission lines quasars: general extinction
英文摘要	Correlations of hot dust emission with outflow properties are investigated, based on a large z similar to 2 non-broad absorption line quasar sample built from the Wide-field Infrared Survey and the Sloan Digital Sky Survey data releases. We use the near-infrared slope and the infrared to UV luminosity ratio to indicate the hot dust emission relative to the emission from the accretion disk. In our luminous quasars, these hot dust emission indicators are almost independent of the fundamental parameters, such as luminosity, Eddington ratio and black hole mass, but moderately dependent on the blueshift and asymmetry index (BAI) and FWHM of C IV lines. Interestingly, the latter two correlations dramatically strengthen with increasing Eddington ratio. We suggest that, in high Eddington ratio quasars, C IV regions are dominated by outflows so the BAI and FWHM (C IV) can reliably reflect the general properties and velocity of outflows, respectively. In low Eddington ratio quasars, on the other hand, C IV lines are primarily emitted by virialized gas so the BAI and FWHM (C IV) become less sensitive to outflows. Therefore, the correlations for the highest Eddington ratio quasars are more likely to represent the true dependence of hot dust emission on outflows and the correlations for the entire sample are significantly diluted by the low Eddington ratio quasars. Our results show that an outflow with a large BAI or velocity can double the hot dust emission on average. We suggest that outflows either contain hot dust in themselves or interact with the dusty interstellar medium or torus.
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 ; BROAD ABSORPTION-LINE ; BLACK-HOLE MASSES ; ENERGY-DISTRIBUTIONS ; SEYFERT-1 GALAXIES ; STELLAR OBJECTS ; SPECTRA ; CONTINUUM ; SPACE
收录类别	SCI
语种	英语
WOS记录号	WOS:000325489200002
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/18030]
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, Univ Sci & Technol China, Dept Astron, Key Lab Res Galaxies & Cosmol, Anhua 230026, Peoples R China 2.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 3.Polar Res Inst China, Shanghai 200136, Peoples R China
推荐引用方式 GB/T 7714	Wang, Huiyuan,Xing, Feijun,Zhang, Kai,et al. OUTFLOW AND HOT DUST EMISSION IN HIGH-REDSHIFT QUASARS[J]. ASTROPHYSICAL JOURNAL LETTERS,2013,776(1):1.
APA	Wang, Huiyuan,Xing, Feijun,Zhang, Kai,Wang, Tinggui,Zhou, Hongyan,&Zhang, Shaohua.(2013).OUTFLOW AND HOT DUST EMISSION IN HIGH-REDSHIFT QUASARS.ASTROPHYSICAL JOURNAL LETTERS,776(1),1.
MLA	Wang, Huiyuan,et al."OUTFLOW AND HOT DUST EMISSION IN HIGH-REDSHIFT QUASARS".ASTROPHYSICAL JOURNAL LETTERS 776.1(2013):1.