Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980sva....24..300v&link_type=abstract
(Astronomicheskii Zhurnal, vol. 57, May-June 1980, p. 520-525.) Soviet Astronomy, vol. 24, May-June 1980, p. 300-303. Translati
Astronomy and Astrophysics
Astronomy
5
Binary Stars, Stellar Spectra, Variable Stars, H Lines, White Dwarf Stars
Scientific paper
Spectroscopic observations of MV Lyr, a possible AM Her star, are reported. The spectrum varies with time: rather strong emission lines will appear, only to vanish completely with the spectrum becoming a pure continuum. The emission-line profiles fluctuate rapidly on time scales shorter than 1 min, inducing large, irregular variations in the measured radial velocity. The form of the Balmer decrement depends significantly on the emission-line intensities. Hydrogen absorption lines presumably belonging to a white dwarf component have been detected. The observations are most simply explained by accepting that MV Lyr is a close binary system.
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