UBV stellar photometry of bright stars in GC M5. II. Physical parameters of HB stars

Details UBV stellar photometry of bright stars in GC M5. II. Physical parameters of HB stars UBV stellar photometry of bright stars in GC M5. II. Physical parameters of HB stars

2001-08-09

arxiv.org/abs/astro-ph/0108163v1

Mon.Not.Roy.Astron.Soc. 328 (2001) 944

Astronomy and Astrophysics

Astrophysics

7 pages, 9 postscript figures, LaTeX, uses mn.sty and epsf.sty, submitted to MNRAS

Scientific paper

10.1046/j.1365-8711.2001.04920.x

The physical parameters of the stars in the central region of the globular cluster M5 (NGC 5904) were determined from UBV photometry using Kurucz (1992) synthetic flux distributions and some empirical relations. It is found that the bluest horizontal branch 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 (Markov et al. 1999) is probably a statistical fluctuation.

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