Small amplitude horizontal branch variable stars near the red boundary of the instability strip in M3.

Details Small amplitude horizontal branch variable stars near the red boundary of the instability strip in M3. Small amplitude horizontal branch variable stars near the red boundary of the instability strip in M3.

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ppmto..18..321y&link_type=abstract

Publ. Purple Mt. Obs., Vol. 18, No. 3, p. 321 - 324

Other

Globular Clusters: Rr Lyrae Stars

Scientific paper

The authors report the existence of another variable star near the red boundary in M3 with longer period (P1 = 1.078 day) and lower amplitude (0.03 mag in V). This is the star II-47. According to Johnson and Sandage, list V = 15.59 and B-V = 0.47. However, this star is located slightly redward of the red boundary when II-47 is plotted in the C-M diagram. In the period - amplitude diagram, the three stars (I-42, I-100, II-47) form a small group.

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