Abstract
view Abstract Citations (24) References (14) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A CCD Search for Faint Variables in the Field of an omega Centauri Low-Luminosity X-Ray Source, and in 47 Tucanae Shara, Michael M. ; Kaluzny, Janusz ; Potter, Michael ; Moffat, Anthony F. J. Abstract The results of a CCD search for faint and/or small amplitude variables in the field of a low luminosity X-ray source in Omega Cen, and in a rich field in 47 Tuc is reported. None of the about 3750 stars identified by DAOPHOT in the two frames varied by as much as sigma = 0.03-0.08 mag during 3-4 hr of frequently repeated imaging. If the Omega Cen X-ray source is variable, it was fainter than about + 7.5 during the observations. Contact binaries (W UMa stars) are at least as rare in the outskirts of these globulars as they are in the solar vicinity. Publication: The Astrophysical Journal Pub Date: May 1988 DOI: 10.1086/166317 Bibcode: 1988ApJ...328..594S Keywords: Cepheid Variables; Charge Coupled Devices; Globular Clusters; Stellar Luminosity; Variable Stars; X Ray Binaries; Computational Astrophysics; Dwarf Novae; Neutron Stars; Stellar Evolution; X Ray Sources; Astronomy; CLUSTERS: GLOBULAR; STARS: BINARIES; STARS: STELLAR STATISTICS; STARS: VARIABLES; X-RAYS: BINARIES full text sources ADS | data products SIMBAD (5)
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