Systematic Serendipitous Discovery of Cataclysmic Variables and Other Odd Stars in Globular Clusters

Details Systematic Serendipitous Discovery of Cataclysmic Variables and Other Odd Stars in Globular Clusters Systematic Serendipitous Discovery of Cataclysmic Variables and Other Odd Stars in Globular Clusters

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000hst..prop.8757d&link_type=abstract

HST Proposal ID #8757

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Hst Proposal Id #8757 Hot Stars

Scientific paper

Despite indications that classical cataclysmic variable {CV} stars are rare in globular clusters in general, and in the cluster NGC 6624 in particular, we have serendipitously discovered such a star 6'' from the cluster center. An HST STIS spectrum of the m 22 object, which fell accidentally in the slit during an unrelated program, shows strong, broad emission lines typical of numerous field CVs, and the inferred optical and UV luminosity are also similar. That we have detected such an object in an observation that includes just a few percent of the central area of the cluster may indicate that cluster CVs are more common than previously thought. Here we propose a very simple archival program to examine all public STIS near- and far-UV spectra in globular clusters for similar objects, as well as other unusual hot stars.

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