Serendipitous Discovery of a Cataclysmic Variable in the Globular Cluster NGC 6624 | Zendy

Eric W. Deutsch | Zendy; B. Margon | Zendy; Scott F. Anderson | Zendy; R. A. Downes | Zendy

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Serendipitous Discovery of a Cataclysmic Variable in the Globular Cluster NGC 6624

Author(s) -

Eric W. Deutsch,

B. Margon,

Scott F. Anderson,

R. A. Downes

Publication year - 1999

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/301150

Subject(s) - globular cluster , astrophysics , physics , astronomy , blue straggler , luminosity , star cluster , cluster (spacecraft) , stars , galaxy , computer science , programming language

Despite indications that classical cataclysmic variable (CV) stars are rarein globular clusters in general, and in the cluster NGC 6624 in particular, wehave serendipitously discovered such a star ~6'' from the cluster center. AHubble Space Telescope spectrum of the m~22 object shows strong, broad emissionlines typical of numerous field CVs, and the inferred optical and UV luminosityare also similar. Our accidental observation also provides the firsthigh-quality ultraviolet spectrum of a globular cluster CV. That we havedetected such an object in an observation that includes just a few percent ofthe central area of the cluster may indicate that cluster CVs are more commonthan previously thought, at least near the core.Comment: 11 pages including 4 figures and 1 table. Accepted for publication in The Astronomical Journal, December 199

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