THE OPTICAL GRAVITATIONAL LENSING EXPERIMENT - A CCD SEARCH FOR VARIABLE-STARS IN OPEN CLUSTERS - NGC-5999

Authors
PIETRZYNSKI G KUBIAK M UDALSKI A SZYMANSKI M
Citation
G. Pietrzynski et al., THE OPTICAL GRAVITATIONAL LENSING EXPERIMENT - A CCD SEARCH FOR VARIABLE-STARS IN OPEN CLUSTERS - NGC-5999, Acta Astronomica, 48(3), 1998, pp. 489-508
Citations number
12
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Acta Astronomica → ACNP
ISSN journal
00015237
Volume
48
Issue
3
Year of publication
1998
Pages
489 - 508
Database
ISI
SICI code
0001-5237(1998)48:3<489:TOGLE->2.0.ZU;2-D
Abstract
We report discovery of 41 variable stars in the field of the young ope n cluster NGC 5999. 30 stars have light curves typical for eclipsing s ystems: this group contains three Algol-type and 27 W UMa type variabl e stars. One RR Lyr and one delta Scuti stars form a group of pulsatin g variables. Nine variable stars are of unknown type and classified as miscellaneous. One of them is a periodic, most probably chromospheric ally active star. Our data are too scarce to make any conclusion about periodicity of remaining eight variable stars.