Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...232..176h&link_type=abstract
Astrophysical Journal, Part 1, vol. 232, Aug. 15, 1979, p. 176-180.
Astronomy and Astrophysics
Astrophysics
26
Astronomical Spectroscopy, Binary Stars, Emission Spectra, Line Spectra, Novae, Circular Orbits, Radial Velocity, Spectrograms
Scientific paper
An attempt is made to report spectroscopic observations of the slow nova HR Del that establish this system as a cataclysmic binary. Permitted emission lines in the spectrum of HR Del are examined which indicate that velocity variations with a period of 0.17 day occur and that the velocity amplitudes vary from 97 km/s for the 4686-A line of He II to 27 km/s for H-beta. Circular orbit solutions for three emission lines are presented, and the line-profile behavior with phase is considered. A white-dwarf mass of 1.00 + or - 0.15 solar mass is estimated, along with a red-star mass of 0.50 + or - 0.05 solar mass and an inclination of 42 + or - 5 deg.
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