A study of the wake-like distortions in the light curves of RS CVN stars by means of time analysis

Details A study of the wake-like distortions in the light curves of RS CVN stars by means of time analysis A study of the wake-like distortions in the light curves of RS CVN stars by means of time analysis

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983esasp.201...97b&link_type=abstract

In ESA Statist. Methods in Astron. p 97-102 (SEE N84-19196 09-89)

Astronomy and Astrophysics

Astronomy

9

Binary Stars, Light Curve, Time Series Analysis, Annual Variations, Cross Correlation, Curve Fitting, Least Squares Method, Starspots

Scientific paper

Time series analysis techniques have been applied to lightcurves of RS CVn binaries. The procedure consists in (1) reconstitution of uniformly sampled data by means of a least-square fit in the frequency domain; (2) application of the cross-correlation technique to find the phase displacement between lightcurves of different years. In the hypothesis that the observed variations are due to dark spots, for RU Cnc and CQ Aur the authors find evidences of the existence of a differential rotation and of a latitude drift of the spots, similar to the solar ones; the relative parameters are computed.

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