Hubble Space Telescope Observations of the Post-- Core-Collapse Globular Cluster NGC 6752: A Search for Cataclysmic Variables

Details Hubble Space Telescope Observations of the Post-- Core-Collapse Globular Cluster NGC 6752: A Search for Cataclysmic Variables Hubble Space Telescope Observations of the Post-- Core-Collapse Globular Cluster NGC 6752: A Search for Cataclysmic Variables

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...473l..31b&link_type=abstract

Astrophysical Journal Letters v.473, p.L31

Astronomy and Astrophysics

Astronomy

27

Stars: Binaries, Galaxy: Globular Clusters: Individual Ngc Number: Ngc 6752, Stars: Novae, Cataclysmic Variables, Stars: White Dwarfs, X-Rays: Stars

Scientific paper

We report the results of HST WFPC2 observations of the core of NGC 6752. We identify two candidate cataclysmic variables (CVs) from their strong narrowband H alpha emission, periodic variability, and, in one case, a UV excess. We interpret the variability of these stars as being double-peaked, ellipsoidal light curves, in which case the orbital periods are 5.1 and 3.7 hr. The CV candidates fall at the edge of the error circle of one of the known X-ray sources in the cluster.

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