The variable stars in the field of the globular cluster NGC 6652

Details The variable stars in the field of the globular cluster NGC 6652 The variable stars in the field of the globular cluster NGC 6652

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....97..771h&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 97, March 1989, p. 771-776. Research supported by the Harvard College Observatory.

Astronomy and Astrophysics

Astronomy

5

Astronomical Photometry, Blue Stars, Giant Stars, Globular Clusters, Variable Stars, Astronomical Photography, Cepheid Variables, Light Curve, Metallicity, Stellar Magnitude

Scientific paper

Photometry is presented for nine new variables within the tidal radius of NGC 6652 and for 15 new variables outside the tidal radius. Of the former, four have periods indicating that they are probable RR Lyrae stars. Of the variables outside the tidal radius, eight have periods characteristic of such stars. It is unlikely that any of the RR Lyrae stars are actual members of NGC 6652; thus, this cluster probably possesses the red horizontal branch usually characteristic of its moderately high metallicity.

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