Variable stars in the globular cluster NGC 6362

Citation
B. Mazur et al., Variable stars in the globular cluster NGC 6362, M NOT R AST, 306(3), 1999, pp. 727-735
Citations number
61
Categorie Soggetti
Space Sciences
Journal title
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN journal
00358711 → ACNP
Volume
306
Issue
3
Year of publication
1999
Pages
727 - 735
Database
ISI
SICI code
0035-8711(19990701)306:3<727:VSITGC>2.0.ZU;2-U
Abstract
We report the results of a CCD search for short-period variables in the fie ld 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-ty pe stars and eight are eclipsing binaries. Of the discovered binaries, thre e are EA-type systems, two of which are located on the cluster CMD in the t urn-off region and the third 1 mag 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 ca ndidates exhibit a modulation of the brightness level with an amplitude of 0.1-0.2 mag; 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 pres ented.