Other
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aj....108.2259d&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 108, no. 6, p. 2259-2266
Other
64
A Stars, Absorption Spectra, Binary Stars, M Stars, Novae, Red Giant Stars, Stellar Models, Stellar Orbits, White Dwarf Stars, Astronomical Spectroscopy, Echelle Gratings, Light Curve, Reflecting Telescopes, Spectrographs, Stellar Spectra, Visible Spectrum
Scientific paper
This paper presents a new spectroscopic orbit for the recurrent nova RS Ophiuchi. We analyze echelle spectra obtained during quiescence; some spectra resemble those of A-type stars and some resemble M giant spectra. We derive an orbital period of 460 days for both A-type and M-type absorption features. The A-type features are 0.4P out of phase with the orbit of the M giant. We consider models in which the A-type features can be associated with a hot companion to the M giant, the heated hemisphere of the red giant, or some other component in a binary system. RS Oph is best understood if the A-type features are not associated with either binary component. Our analysis of the orbit and the optical light curve indicates the system has an inclination of 30 deg - 40 deg if the hot component is a Chandrasekhar mass white dwarf.
Dobrzycka Danuta
Kenyon Scott. J.
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