Brightness variations of the cool subgiants of totally eclipsing Algol binaries

Details Brightness variations of the cool subgiants of totally eclipsing Algol binaries Brightness variations of the cool subgiants of totally eclipsing Algol binaries

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...250..704o&link_type=abstract

Astrophysical Journal, Part 1, vol. 250, Nov. 15, 1981, p. 704-708. NSF-supported research.

Astronomy and Astrophysics

Astronomy

20

Brightness Distribution, Eclipsing Binary Stars, Stellar Luminosity, Subgiant Stars, Variable Stars, Infrared Astronomy, Mass Transfer, Stellar Envelopes, Stellar Mass, Stellar Temperature

Scientific paper

In a monitoring program lasting several years, eclipse-to-eclipse variations have been searched for in the light levels of totality in 10 Algol-like binaries. Significant variations were found in U Cep, RW Tau, X Tri, U Sge, and RV Oph. Five-color observations of the first three are adequate to show that the cool contact subgiants were responsible for these variations. Brightness increases of the subgiants in U Cep and RW Tau are shown to be correlated with eruptive transfer events, and therefore are directly related to instabilities in the lobe-filling subgiants.

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