RED GIANT STARS FROM THE SLOAN DIGITAL SKY SURVEY. II. DISTANCES

	RED GIANT STARS FROM THE SLOAN DIGITAL SKY SURVEY. II. DISTANCES
	Tan, Kefeng; Chen, Yuqin; Carrell, Kenneth; Zhao, Jingkun; Zhao, Gang
刊名	ASTROPHYSICAL JOURNAL
	2014-10-10
卷号	794 期号:1
关键词	Galaxy: stellar content stars: distances
英文摘要	We present distance determinations for a large and clean sample of red giant branch stars selected from the ninth data release of the Sloan Digital Sky Survey. The distances are calculated based on both observational cluster fiducials and theoretical isochrones. Distributions of distances from the two methods are very similar with peaks at about 10 kpc and tails extending to more than 70 kpc. We find that distances from the two methods agree well for the majority of the sample stars; though, on average, distances based on isochrones are 10% higher than those based on fiducials. We test the accuracy of our distance determinations using 332 stars from 10 Galactic globular and open clusters. The average relative deviation from the literature cluster distances is 4% for the fiducial-based distances and 8% for the isochrone-based distances, both of which are within the uncertainties. We find that the effective temperature and surface gravity derived from low-resolution spectra are not accurate enough to essentially improve the performance of distance determinations. However, for stars with significant extinction, effective temperature may help to better constrain their distances to some extent. We make our sample stars and their distances available from an online catalog. The catalog comprises 17,941 stars with reasonable distance estimations reaching to more than 70 kpc, which is suitable for the investigation of the formation and evolution of the Galaxy, especially the Galactic halo.
收录类别	SCI
语种	英语
WOS记录号	WOS:000342581200060
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6529]
专题	国家天文台_光学天文研究部
作者单位	Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Tan, Kefeng,Chen, Yuqin,Carrell, Kenneth,et al. RED GIANT STARS FROM THE SLOAN DIGITAL SKY SURVEY. II. DISTANCES[J]. ASTROPHYSICAL JOURNAL,2014,794(1).
APA	Tan, Kefeng,Chen, Yuqin,Carrell, Kenneth,Zhao, Jingkun,&Zhao, Gang.(2014).RED GIANT STARS FROM THE SLOAN DIGITAL SKY SURVEY. II. DISTANCES.ASTROPHYSICAL JOURNAL,794(1).
MLA	Tan, Kefeng,et al."RED GIANT STARS FROM THE SLOAN DIGITAL SKY SURVEY. II. DISTANCES".ASTROPHYSICAL JOURNAL 794.1(2014).