Capability of Quasar Selection by Combining SCUSS and SDSS Observations

	Capability of Quasar Selection by Combining SCUSS and SDSS Observations
	Zou, Hu 1; Wu, Xue-Bing 2,3; Zhou, Xu 1; Wang, Shu 2; Jiang, Linhua 3; Fan, Xiaohui 3,4; Fan, Zhou 1; Jiang, Zhaoji 1; Jing, Yipeng 5; Lesser, Michael 4
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
	2015-02-01
卷号	127 期号:948 页码:94-101
英文摘要	The South Galactic Cap u-band Sky Survey (SCUSS) provides a deep u-band imaging of about 5000 deg(2) in south Galactic cap. It is about 1.5 mag deeper than the SDSS u-band. In this article, we evaluate the capability of quasar selection using both SCUSS and SDSS data, based on considerations of the deep SCUSS u-band imaging and two-epoch u-band variability. We find that the combination of the SCUSS u-band and the SDSS griz-band allows us to select more faint quasars and more quasars at redshift around 2.2 than the selection that uses only the SDSS ugriz data. Quasars have significant u-band variabilities. The fraction of quasars with large two-epoch variability is much higher than that of stars. The selection by variability can select both low-redshift quasars with ultraviolet excess and mid-redshift (2 < z < 3.5) quasars where quasar selection by optical colors is inefficient. The above two selections are complementary and make full use of the SCUSS u-band advantages.
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 ; Z-SIMILAR-TO-6 QUASARS ; OPTICAL VARIABILITY ; TARGET SELECTION ; BLACK-HOLES ; STRIPE 82 ; REIONIZATION ; EVOLUTION ; COLORS ; UKIDSS
收录类别	SCI
语种	英语
WOS记录号	WOS:000349769800002
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/18207]
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, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 2.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China 3.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 4.Univ Arizona, Steward Observ, Tucson, AZ 85721 USA 5.Shanghai Jiao Tong Univ, Dept Phys & Astron, Ctr Astron & Astrophys, Shanghai 200240, Peoples R China 6.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
推荐引用方式 GB/T 7714	Zou, Hu,Wu, Xue-Bing,Zhou, Xu,et al. Capability of Quasar Selection by Combining SCUSS and SDSS Observations[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,2015,127(948):94-101.
APA	Zou, Hu.,Wu, Xue-Bing.,Zhou, Xu.,Wang, Shu.,Jiang, Linhua.,...&Zhou, Zhimin.(2015).Capability of Quasar Selection by Combining SCUSS and SDSS Observations.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,127(948),94-101.
MLA	Zou, Hu,et al."Capability of Quasar Selection by Combining SCUSS and SDSS Observations".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 127.948(2015):94-101.