Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...388..614d&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 388, April 1, 1992, p. 614-620.
Astronomy and Astrophysics
Astrophysics
20
Astronomical Spectroscopy, Binary Stars, Cataclysmic Variables, Dwarf Novae, H Alpha Line, Stellar Mass, Angular Momentum, Mass Transfer, Radial Velocity, White Dwarf Stars
Scientific paper
Time-resolved spectroscopic observations of the cataclysmic variable PG 0917 + 342 which reveal it to be a novalike system with an orbital period of 104 minutes are presented. The spectra show lines of H, He I, and Ca I in absorption with variable emission cores, and H-alpha emission always above the continuum. Orbital parameters derived from the present radial velocity data indicate a system inclination of about 32 deg, M2 = 0.2 solar mass, and a likely, but not well determined, mass for the white dwarf of about 0.3 solar mass. PG 0917 + 342 appears to be the first nonmagnetic novalike star below the CV period gap.
Dobrzycka Danuta
Howell Steve B.
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