UBV stellar photometry of bright stars in GC M5 -: II.: Physical parameters of horizontal branch stars

被引：4

作者：

Baev, PV

Markov, H

Spassova, N

机构：

[1] Bulgarian Acad Sci, Inst Astron, Natl Astron Observ Rozhen, BG-4700 Smoljan, Bulgaria

[2] Bulgarian Acad Sci, Inst Astron, BG-1784 Sofia, Bulgaria

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2001年 / 328卷 / 03期

关键词：

stars : evolution; stars : horizontal branch; stars : Population II; globular clusters : general; globular clusters : individual : M5 NGC 5904;

D O I：

10.1046/j.1365-8711.2001.04920.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The physical parameters of the stars in the central region of the globular cluster M5 (NGC 5904) were determined from UBV photometry using Kurucz's synthetic flux distributions and some empirical relations. It is found that the bluest horizontal branch (HB) stars have higher luminosities than predicted by canonical zero-age horizontal branch models. Parameters of the mass distribution on the HB stars are determined. It is shown that the gap in the blue HB previously reported by Markov et al. in Paper I is probably a statistical fluctuation.

引用

页码：944 / 950

页数：7

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