PHOTOELECTRIC UBV PHOTOMETRY OF STARS SELECTED IN THE HK OBJECTIVE-PRISM SURVEY

被引:49
作者
PRESTON, GW [1 ]
SHECTMAN, SA [1 ]
BEERS, TC [1 ]
机构
[1] MICHIGAN STATE UNIV,DEPT PHYS & ASTRON,E LANSING,MI 48824
关键词
PHOTOMETRY; STARS; HORIZONTAL-BRANCH; WEAK-LINE;
D O I
10.1086/191587
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Photoelectric UBV observations of 1782 stars are used to explore properties of the HK objective-prism survey conducted by Beers, Preston, and Shectman with the Curtis-Schmidt telescope of the Cerro Tololo Inter-American Observatory. We construct an intrinsic (U - B)0 versus (B - V)0 relation for blue horizontal branch stars and use it to derive estimates of E(B - V) color excesses in 50 survey fields. Comparison of these with the reddening maps of Burstein and Heiles indicates good agreement except in low-latitude fields toward the Galactic bulge. We describe qualitative features of the stellar content of the HK survey by use of unreddened two-color diagrams and indicate how the photometric data may prove useful in several applications. Finally, we use a halo density model to estimate the variation of completeness with apparent magnitude, B, in our catalog of field horizontal branch star candidates.
引用
收藏
页码:1001 / 1031
页数:31
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