Variable stars in the globular cluster NGC 6362

Details Variable stars in the globular cluster NGC 6362 Variable stars in the globular cluster NGC 6362

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999mnras.306..727m&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 306, Issue 3, pp. 727-735.

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16

Scientific paper

We report the results of a CCD search for short-period variables in the field of a southern globular cluster NGC 6362. We identified 19 new candidate variables, five of which are cluster RR Lyraes, four are probable SX Phe-type stars and eight are eclipsing binaries. Of the discovered binaries, three are EA-type systems, two of which are located on the cluster CMD in the turn-off region and the third 1mag above the turn-off point, in the yellow straggler region. Five other systems are of W UMa type, three of which are foreground objects and two are likely cluster members. The remaining two candidates exhibit a modulation of the brightness level with an amplitude of 0.1-0.2mag further observations are needed to reveal the nature of their variability. Phased VI light curves for 20 variables (18 RR Lyrae stars and two blue stragglers) located in the central region of the cluster are presented.

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