The 8190 A sodium doublet in cataclysmic variables. I - The quest

Details The 8190 A sodium doublet in cataclysmic variables. I - The quest The 8190 A sodium doublet in cataclysmic variables. I - The quest

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.233..451f&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 233, July 15, 1988, p. 451-474.

Other

52

Accretion Disks, Cataclysmic Variables, Spectrum Analysis, Stellar Spectra, Line Spectra, Sodium, Stellar Envelopes

Scientific paper

The authors have carried out a near-infrared spectroscopic survey of 65 cataclysmic variables aimed at detecting absorption features from the secondary star, especially the Na I doublet at λλ8183.3, 8194.8 Å. They have positively identified these lines in 16 cataclysmic variables of various types with periods from 3 to 9 hr. Many of these objects show other features indicative of a late-type star. The authors have observed the λ7773 Å O I triplet in 28 objects. This feature varies considerably from object to object and may be a useful indicator of the state of the disc. The authors have also detected emission lines of He I (λλ7065, 7281 Å), He II (λ8236 Å), O I (λ8446 Å), Ca II (λ8498 Å) and a further emission feature to the red of λ8200 Å that may be associated with the Paschen series limit.

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