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RZ Gru - a UX UMa 'disc star'

1984; Oxford University Press; Volume: 206; Issue: 4 Linguagem: Inglês

10.1093/mnras/206.4.819

1365-2966

D. J. Stickland, B. D. Kelly, J. A. Cooke, I. M. Coulson, C. A. Engelbrecht, D. Kilkenny, Jonathan Spencer-Jones,

Stellar, planetary, and galactic studies

The star RZ Gruis is confirmed as a cataclysmic variable. Its ultraviolet spectrum suggests that it belongs to the UX UMa subclass in which an optically thick disc is maintained at outburst state; coordinated optical and UV photometry show changes of about one magnitude on a time-scale of months in addition to smaller variations on a scale of minutes, but not the major outbursts of the dwarf novae.