A MONTE CARLO METHOD FOR MAKING THE SDSS u-BAND MAGNITUDE MORE ACCURATE

	A MONTE CARLO METHOD FOR MAKING THE SDSS u-BAND MAGNITUDE MORE ACCURATE
	Gu, Jiayin 1; Du, Cuihua 2; Zuo, Wenbo 2; Jing, Yingjie 2; Wu, Zhenyu3 ; Ma, Jun3 ; Zhou, Xu3
刊名	ASTRONOMICAL JOURNAL
	2016-10-01
卷号	152 期号:4
关键词	Galaxy: abundances methods: data analysis stars: fundamental parameters stars: statistics
英文摘要	We develop a new Monte Carlo-based method to convert the Sloan Digital Sky Survey (SDSS) u-band magnitude to the south Galactic Cap of the u-band Sky Survey (SCUSS) u-band magnitude. Due to the increased accuracy of SCUSS u-band measurements, the converted u-band magnitude becomes more accurate compared with the original SDSS u-band magnitude, in particular at the faint end. The average. u-magnitude error (for both SDSS and SCUSS) of numerous main-sequence stars with 0.2 < g - r < 0.8 increases as the g-band magnitude becomes fainter. When g = 19.5, the average magnitude error of the SDSS u is 0.11. When g = 20.5, the average SDSS u error rises to 0.22. However, at this magnitude, the average magnitude error of the SCUSS u is just half as much as that of the SDSS u. The SDSS u-band magnitudes of main-sequence stars with 0.2 < g - r < 0.8 and 18.5 < g < 20.5 are converted, therefore the maximum average error of the converted u-band magnitudes is 0.11. The potential application of this conversion is to derive a more accurate photometric metallicity calibration from SDSS observations, especially for the more distant stars. Thus, we can explore stellar metallicity distributions either in the Galactic halo or some stream stars.
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 ; STELLAR METALLICITY DISTRIBUTION ; MILKY-WAY TOMOGRAPHY ; SOUTH GALACTIC CAP ; INTERMEDIATE-LATITUDE ; CALIBRATION ; SCUSS ; STARS ; HALO
收录类别	SCI
语种	英语
WOS记录号	WOS:000385749000004
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6844]
专题	国家天文台_光学天文研究部
作者单位	1.Wuhan Univ Technol, Dept Phys, Wuhan 430000, Peoples R China 2.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Gu, Jiayin,Du, Cuihua,Zuo, Wenbo,et al. A MONTE CARLO METHOD FOR MAKING THE SDSS u-BAND MAGNITUDE MORE ACCURATE[J]. ASTRONOMICAL JOURNAL,2016,152(4).
APA	Gu, Jiayin.,Du, Cuihua.,Zuo, Wenbo.,Jing, Yingjie.,Wu, Zhenyu.,...&Zhou, Xu.(2016).A MONTE CARLO METHOD FOR MAKING THE SDSS u-BAND MAGNITUDE MORE ACCURATE.ASTRONOMICAL JOURNAL,152(4).
MLA	Gu, Jiayin,et al."A MONTE CARLO METHOD FOR MAKING THE SDSS u-BAND MAGNITUDE MORE ACCURATE".ASTRONOMICAL JOURNAL 152.4(2016).