Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90..643s&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 90, April 1985, p. 643-646.
Astronomy and Astrophysics
Astronomy
21
Cataclysmic Variables, Orbital Elements, Stellar Motions, Stellar Spectra, Radial Velocity, Spectral Line Width, Stellar Mass
Scientific paper
Spectroscopic observations are presented for CM Del, V380 Oph, and VW Vul which reveal their orbital periods to be 0.162, 0.16, and 0.073 days, respectively. The spectra of CM Del and V380 Oph appear to be characteristic of novalike systems. In particular, the spectra suggest relatively high mass-transfer rates in these two systems. Such high mass-transfer rates are typical of novalike variables in particular, and of cataclysmic variables with orbital periods between 0.13 and 0.17 days in general. The ultrashort period system VW Vul has a spectrum which suggests a lower mass-transfer rate than in either CM Del or V380 Oph. The spectrum of VW Vul is typical of a dwarf nova.
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