Binaries in globular clusters - Outburst and quiescence spectra of three cataclysmics

Journal Article · Fri Jun 01 04:00:00 EDT 1990 · Astronomical Journal; (USA)

DOI:https://doi.org/10.1086/115462· OSTI ID:6698409

Shara, M M; Potter, M; Moffat, A F.J. ^[1]

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1. Space Telescope Science Institute, Baltimore, MD (USA) Montreal Universite, Montreal (Canada)

As part of an ongoing effort to understand the properties of binaries in globulars, the first spectrum of an old nova in a globular cluster has been obtained. H-alpha emission confirms the presence of the quiescent nova within 1 arcsec of the optical candidate proposed by Shara et al (1986). The Shara et al. candidate is clearly seen to be multiple. The first outburst spectrum of the candidate dwarf nova V4 in M30 has also been obtained. The extremely blue continuum and strong Balmer absorption are typical of an outbursting dwarf nova (DN), and support Margon and Downes' (1983) DN classification (based on a spectrum of V4 in quiescence). 15 refs.

• OSTI ID: 6698409
• Journal Information: Astronomical Journal; (USA), Journal Name: Astronomical Journal; (USA) Vol. 99; ISSN 0004-6256; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
BALMER LINES
BINARY STARS
CHARGE-COUPLED DEVICES
ERUPTIVE VARIABLE STARS
NOVAE
SEMICONDUCTOR DEVICES
SPECTRA
SPECTROPHOTOMETRY
STAR CLUSTERS
STARS
VARIABLE STARS