RR Lyrae variables in the globular cluster M3 (NGC5272). I. BVI CCD photometry

Details RR Lyrae variables in the globular cluster M3 (NGC5272). I. BVI CCD photometry RR Lyrae variables in the globular cluster M3 (NGC5272). I. BVI CCD photometry

1998-04-09

arxiv.org/abs/astro-ph/9804095v1

Astronomy and Astrophysics

Astrophysics

19 pages, latex, uses mn.sty, 12 encapsulated figures, to be published in MNRAS, text and figures also available at http://w

Scientific paper

10.1046/j.1365-8711.1998.01698.x

New BVI CCD photometry is presented for 60 RR Lyrae variables in the globular cluster M3. Light curves have been constructed and ephemerides have been (re)-derived for all of them. Four stars (i.e. V29, V136, V155 and V209), although recognized as variables, had no previous period determinations. Also, the period derived for V129 is significantly different from the one published by Sawyer-Hogg (1973). Light curve parameters, i.e. mean magnitudes, amplitudes and rise-times, have been derived. The discussion of these results in the framework of the stellar evolution and pulsation theories will be presented in a forthcoming paper.

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