Possible cataclysmic variable in the core of the globular cluster 47 Tucanae

Details Possible cataclysmic variable in the core of the globular cluster 47 Tucanae Possible cataclysmic variable in the core of the globular cluster 47 Tucanae

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.360...46p&link_type=abstract

Nature (ISSN 0028-0836), vol. 360, no. 6399, p. 46-48.

Astronomy and Astrophysics

Astronomy

51

Cataclysmic Variables, Globular Clusters, Stellar Spectra, X Ray Sources, Accretion Disks, Astronomical Photometry, Binary Stars, Magnetic Stars, Optical Properties, White Dwarf Stars

Scientific paper

The Faint Object Camera was used to search for the optical counterpart to the low-luminosity X-ray source X0021.8-7221 in the globular cluster 47 Tucanae. A faint, variable, and very blue object was discovered in the error circle for X0021.8-7221 from the Einstein satellite High-Resolution Imager. The object has the spectral characteristics of a cataclysmic variable, and the high inferred X-ray to partial brightness ratio suggests that it is a magnetic cataclysmic variable, one of the candidates that has been suggested as the X-ray source in globular clusters.

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