A new red variable star in the globularcluster M4

Details A new red variable star in the globularcluster M4 A new red variable star in the globularcluster M4

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cha%26a..28..399y&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 28, Issue 4, p. 399-403.

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

G302 = L3107 is a red star located at the lowest end of the red giant branch of the globular cluster M4. According to its location on the C-M diagram, G302 may be a cluster member. No proper motion or radial velocity determinations are available up to date. We discovered that C302 is a new variable star with a main period of 1.24719 day and a peak to peak amplitude of about 0.3 mag in V. It may have a second period of 2.38249 day with an amplitude of about 0.05 mag. If it is a cluster member, then there will be interesting implications for the the theory of stellar evolution.

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