A new red variable star in the globular cluster M4

Details A new red variable star in the globular cluster M4 A new red variable star in the globular cluster M4

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004acasn..45..237y&link_type=abstract

Acta Astronomica Sinica, vol. 45, no. 3, p. 237-241

Astronomy and Astrophysics

Astronomy

2

Variable Star: Globular Cluster

Scientific paper

G302 = L3107 is a red star located at the lowest end of red giant branch in 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 published for this star for the time being. We discovered that G302 is a new variable star with a main period of 1.24719 day and peak to peak amplitude of about 0.3 mag in V. May be it has a second period of 2.38249 day with peak to peak amplitude of about 0.05 mag. If it is a cluster member, the meaning in stellar evolution is evident.

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