Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982aj.....87..635p&link_type=abstract
Astronomical Journal, vol. 87, Apr. 1982, p. 635-639.
Astronomy and Astrophysics
Astronomy
6
Globular Clusters, Light Curve, Stellar Spectrophotometry, Variable Stars, Astronomical Coordinates, Brightness Distribution, Photographic Plates
Scientific paper
The magnitudes, amplitudes, and elements of variables in the globular cluster NGC 6864 were investigated. The number of the variable, the x and y rectangular coordinates in arcsec, the maximum, minimum, and median blue magnitudes are given along with the epochs and periods when available. It is found that the cluster contains at least 10 variables of the RR Lyrae type. Three are of the a type with periods from 0.49 to 0.59 days and mean amplitude 1.15, and three are of the c type with periods near 0.27 days and mean B amplitude 0.72. The period distribution indicates that the cluster belongs to Oosterhoff Class I. Four of the remaining stars seem to be constant, one may be irregular or semiregular.
Clement Christine M.
Pinto Gregory
Rosino Leonida
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