Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...300..788c&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 300, Jan. 15, 1986, p. 788-793.
Astronomy and Astrophysics
Astrophysics
54
Binary Stars, Cataclysmic Variables, Novae, Stellar Orbits, Stellar Spectra, X Ray Sources, Circular Orbits, H Lines, K Stars, Orbital Elements, Radial Velocity, Stellar Evolution, Stellar Mass, White Dwarf Stars
Scientific paper
New spectroscopic observations of the old nova GK Per reveal the orbital period to be 1.996803 + or - 0.000007 days. The orbit is circular and the late-type component has a semiamplitude of 124 + or - 2 km/s. The hydrogen emission lines show a velocity variation in antiphase with the absorption lines with a semiamplitude of 34 + or - 5 km/s. The most probable masses are 0.25 solar mass for the K star and 0.9 solar mass for the white dwarf. The K star has obviously lost a lot of mass and is continuing to do so. An effort should be made to obtain photometry at the predicted times of occultation to see whether the system is eclipsing in order to further define the parameters of the system.
Cowley Anne Pyne
Crampton David
Fisher Wesley A.
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