Discovery of a cyclic period change in the contact binary system V1128 Tau

Details Discovery of a cyclic period change in the contact binary system V1128 Tau Discovery of a cyclic period change in the contact binary system V1128 Tau

Jul 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ap%26ss.334..131l&link_type=abstract

Astrophysics and Space Science, Volume 334, Issue 1, pp.131-137

Astronomy and Astrophysics

Astrophysics

Stars: Binaries: Close, Stars: Binaries: Eclipsing, Stars: Individuals (V1128 Tau), Stars: Evolution

Scientific paper

We obtained several epochs of light minima and a complete R light curve of the W-type contact binary V1128 Tau in 2009. Two cool spots on the massive component are used to model the photometric light curve. Using all available data we find evidence for a long-term period variation with an amplitude of 0.0050±0.0012 days and a period of 16.7±0.9 years. Using parameters derived from a photometric model of the 2009 light curve we show that this period change could be explained by the Applegate mechanism on one of the components.

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