Cool-star photometric activity in six totally-eclipsing Algol binaries

Details Cool-star photometric activity in six totally-eclipsing Algol binaries Cool-star photometric activity in six totally-eclipsing Algol binaries

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....106..342o&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 106, no. 1, p. 342-347.

Astronomy and Astrophysics

Astronomy

16

Astronomical Photometry, Cool Stars, Eclipsing Binary Stars, Stellar Color, Subgiant Stars, Angular Velocity, Brightness, Starspots, X Ray Sources

Scientific paper

We summarize results of an intermediate-band five-color photometric program that monitored the cool subgiant stars in six totally-eclipsing Algol binaries for intervals of 7 to 14 years. Brightness changes occurred in all of these stars, whose orbital periods range from 0.97 to 9.48 days. Analysis of conspicuous variations in RW Tau shows that they are consistent with changes in total area (or temperature) of cool star spots. These brightness fluctuations grow with increasing rotational velocity or decreasing orbital period, suggesting that rotationally-induced magnetic activity may be responsible for these variations.

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