CCD PHOTOMETRY OF FAINT VARIABLE-STARS IN THE FIELD OF THE GLOBULAR-CLUSTER M4

Authors
KALUZNY J THOMPSON IB KRZEMINSKI W
Citation
J. Kaluzny et al., CCD PHOTOMETRY OF FAINT VARIABLE-STARS IN THE FIELD OF THE GLOBULAR-CLUSTER M4, The Astronomical journal, 113(6), 1997, pp. 2219-2225
Citations number
28
Categorie Soggetti
Astronomy & Astrophysics
Journal title
The Astronomical journal → ACNP
ISSN journal
00046256
Volume
113
Issue
6
Year of publication
1997
Pages
2219 - 2225
Database
ISI
SICI code
0004-6256(1997)113:6<2219:CPOFVI>2.0.ZU;2-S
Abstract
We present the results of a photometric survey for faint variable star s in the nearby globular cluster M4. Twelve variables were discovered. Seven of the twelve are W Ursa Majoris stars that are probable member s of the cluster. Another variable is a faint blue degenerate star wit h a period of about 60 minutes, While the magnitude and colors of this star are consistent with those of a cataclysmic variable in M4, a spe ctrum shows no emission lines. (C) 1997 American Astronomical Society.