Measurement of the limb darkening coefficient of stars

	Measurement of the limb darkening coefficient of stars
	Zhao, DF ; Hang, HR
刊名	CHINESE ASTRONOMY AND ASTROPHYSICS
	2000-10-01
卷号	24 期号:4 页码:481-494
关键词	stellar atmosphere limb darkening coefficient
ISSN号	0275-1062
英文摘要	This paper introduces a new method of describing the limb darkening phenomenon of stellar atmospheres in the 1st and 2nd order approximations. The limb darkening coefficients are given by direct measurements of relevant physical quantities or measurements of flux and a supplementary quantity, namely, the star's surface temperature. The comparison either with solar observations or with the method of numerical simulation of the atmosphere shows that the new method can very accurately describe the star's limb darkening and determine its relevant coefficients. The accuracy of the new direct method is assessed using 176 observational data points of the Sun, and the mean fractional differences is found to be 0.38% for the 1st-, and 0.26% for the 2nd-order approximations. The mean differences of the indirect method are close to, and slightly larger than these values. When compared with numerical models of the atmosphere, the differences are in the range from under 1% to under 3%.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
收录类别	SCI
语种	英语
WOS记录号	WOS:000165799700010
公开日期	2013-02-01
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/8289]
专题	紫金山天文台_期刊（老文献）
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Zhejiang Normal Univ, Jinhua 321004, Peoples R China
推荐引用方式 GB/T 7714	Zhao, DF,Hang, HR. Measurement of the limb darkening coefficient of stars[J]. CHINESE ASTRONOMY AND ASTROPHYSICS,2000,24(4):481-494.
APA	Zhao, DF,&Hang, HR.(2000).Measurement of the limb darkening coefficient of stars.CHINESE ASTRONOMY AND ASTROPHYSICS,24(4),481-494.
MLA	Zhao, DF,et al."Measurement of the limb darkening coefficient of stars".CHINESE ASTRONOMY AND ASTROPHYSICS 24.4(2000):481-494.