The eclipses of starspots

Details The eclipses of starspots The eclipses of starspots

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ap%26ss.143....1b&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 143, no. 1, April 1988, p. 1-14.

Statistics

Computation

4

Astronomical Photometry, Eclipsing Binary Stars, Light Curve, Starspots, Stellar Luminosity, Variable Stars, Computational Astrophysics, Cool Stars, Elliptic Functions, Spectrum Analysis, Stellar Activity

Scientific paper

Formulas are set out from which the light loss may be derived in a close binary system in which a component affected by a 'starspot', of the type considered previously (Budding, 1977) is also in eclipse, in such a way that the starspot itself is undergoing eclipse. In this way the hitherto postponed problem of the combination of eclipse and maculation effects (which are sometimes believed to be present, e.g., in RS CVn-stars) is treated, and shown to be reducible to expressions involving algebraic or elliptic integrals. A more practical approach using a 'small-spot approximation' is given, and demonstrated on an example. Such an approach should be easy to manage by computer, and is expected to find a ready application in the analysis of 'active' cool, close binaries.

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