Estimation of absolute magnitude-dependent Galactic model parameters in intermediate latitude with SDSS and SCUSS

	Estimation of absolute magnitude-dependent Galactic model parameters in intermediate latitude with SDSS and SCUSS
	Jia, Yunpeng1 ; Du, Cuihua 1; Wu, Zhenyu2 ; Peng, Xiyan2 ; Ma, Jun2 ; Zhou, Xu2 ; Fan, Xiaohui 3,4; Fan, Zhou2 ; Jing, Yipeng 5; Jiang, Zhaoji 2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2014-06-01
卷号	441 期号:1 页码:503-512
关键词	Galaxy: disc Galaxy: fundamental parameters Galaxy: halo Galaxy: structure
英文摘要	Based on the Sloan Digital Sky Survey and South Galactic Cap of u-band Sky Survey (SCUSS) early data, we use a star count method to estimate the Galactic structure parameters in an intermediate latitude with 10 180 main-sequence (MS) stars in an absolute magnitude interval of 4 <= M-r <= 13. We divide the absolute magnitude into five intervals, 4 <= M-r < 5, 5 <= M-r < 6, 6 <= M-r < 8, 8 <= M-r < 10 and 10 <= M-r <= 13, and estimate the Galactic structure parameters in each absolute magnitude interval to explore their possible variation with the absolute magnitude. Our study shows that the parameters depend on absolute magnitude. For the thin disc, the intrinsic faint MS stars have large local space density and they tend to stay close to the Galactic plane. A plausible explanation is that faint MS stars with long lifetime experience and long gravitational interaction time result in a short scaleheight. However, for the thick disc, the parameters show a complex trend with absolute magnitude, which may imply the complicated original of the thick disc. For the halo, the intrinsic faint MS stars have large local density and small axial ratio, which indicate a flattened inner halo and a more spherical outer halo.
收录类别	SCI
语种	英语
WOS记录号	WOS:000336249300035
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6523]
专题	国家天文台_光学天文研究部
作者单位	1.Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China 3.Univ Arizona, Dept Astron, Tucson, AZ 85721 USA 4.Univ Arizona, Steward Observ, Tucson, AZ 85721 USA 5.Shanghai Jiao Tong Univ, Dept Phys & Astron, 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	Jia, Yunpeng,Du, Cuihua,Wu, Zhenyu,et al. Estimation of absolute magnitude-dependent Galactic model parameters in intermediate latitude with SDSS and SCUSS[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,441(1):503-512.
APA	Jia, Yunpeng.,Du, Cuihua.,Wu, Zhenyu.,Peng, Xiyan.,Ma, Jun.,...&Zhou, Zhimin.(2014).Estimation of absolute magnitude-dependent Galactic model parameters in intermediate latitude with SDSS and SCUSS.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,441(1),503-512.
MLA	Jia, Yunpeng,et al."Estimation of absolute magnitude-dependent Galactic model parameters in intermediate latitude with SDSS and SCUSS".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 441.1(2014):503-512.