Photometry of long-period Algol binaries. II - Anomalies in five-color photometric solutions of RS Cephei

Details Photometry of long-period Algol binaries. II - Anomalies in five-color photometric solutions of RS Cephei Photometry of long-period Algol binaries. II - Anomalies in five-color photometric solutions of RS Cephei

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....91.1421o&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 91, June 1986, p. 1421-1427.

Astronomy and Astrophysics

Astronomy

8

Eclipsing Binary Stars, Stellar Color, Stellar Mass Accretion, Stellar Spectrophotometry, Ubv Spectra, A Stars, Accretion Disks, Anomalies, Cool Stars, Infrared Spectra, Light Curve, Spectral Energy Distribution

Scientific paper

New photometric solutions, essentially consistent at five wavelengths, are derived for the long-period totally eclipsing binary RS Cephei. The relatively small perturbations to the continuum light from the accretion disk surrounding the hot gainer are isolated and discussed, and a disk temperature of roughly 6000 K is found. Light perturbations suggest that the disk is asymmetrical, with most of the matter above the trailing hemisphere of the gainer. Occasional brightenings of the system at all wavelengths are identified as accretion episodes, when matter from the disk strikes the photosphere of the gainer. Large color anomalies, variable from eclipse to eclipse, were detected across the disk of the gainer during partial phases of primary eclipse. These color variations, which are not explainable by any simple model, appear to be a new effect among eclipsing binaries.

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