Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...192..128v&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 192, no. 1-2, March 1988, p. 128-134.
Astronomy and Astrophysics
Astrophysics
3
Astronomical Spectroscopy, Continuous Spectra, Dwarf Novae, Lyra Constellation, Stellar Spectra, Accretion Disks, Balmer Series, Binary Stars, Stellar Magnetic Fields, Stellar Models, White Dwarf Stars
Scientific paper
The results of spectroscopic observations of the nova-like object MV Lyr at minimum light (mv ⪆ 18m) are presented. From radial velocity measurements of the hydrogen lines the author determined a system period P = 0d.1324. It is shown that the high excitation spectra are formed in a small volume and that they are likely produced by infall of matter onto the white dwarf's surface near a magnetic pole. The spectral class of the secondary is estimated to be M5 V. The masses of the components are estimated as: M1 = 0.88 M_sun; and M2 = 0.43 M_sun;; the system inclination is i = 24°; the distance between the components is 0.8×1011cm. The spectral characteristics of the system at maximum and minimum are compared. The observed phenomena are interpreted in terms of non-stationary outflow from the secondary.
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