A photometric study and analysis of XY Leonis

Details A photometric study and analysis of XY Leonis A photometric study and analysis of XY Leonis

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...290..696h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 290, March 15, 1985, p. 696-706. Research supported by the University of Pe

Astronomy and Astrophysics

Astrophysics

23

Eclipsing Binary Stars, Light Curve, Spectrum Analysis, Starspots, Stellar Spectrophotometry, Annual Variations, Fourier Transformation, Mass To Light Ratios, Spectral Energy Distribution, Stellar Activity, Stellar Color, Ubv Spectra

Scientific paper

Photoelectric observations of the short-period contact system XY Leo have been obtained over the past six seasons, and include three seasonal light curves. Times of minimum light indicate a series of period changes, or perhaps the effects of a third body. Season-to-season changes are seen in the light curves. The light curves are analyzed, using the new spectroscopic mass ratio of Hrivnak et al., and absolute parameters are determined. The system appears to be essentially unevolved. An examination of the available photometric and spectroscopic data indicates that the intrinsic light-curve variability is consistent with starspot activity on one or both components.

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