Long Term Evolution Of Surface Features On The Unusual Close Binary V361 Lyr

Details Long Term Evolution Of Surface Features On The Unusual Close Binary V361 Lyr Long Term Evolution Of Surface Features On The Unusual Close Binary V361 Lyr

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21343405l&link_type=abstract

American Astronomical Society, AAS Meeting #213, #434.05; Bulletin of the American Astronomical Society, Vol. 41, p.304

Astronomy and Astrophysics

Astronomy

Scientific paper

We present light curves secured over a ten year baseline of the close binary V361 Lyr obtained with four different telescopes. V361 Lyr is an unusual and possibly unique close binary system consisting of a F9V primary and a K1-2V secondary with strong evidence of mass transfer between the components and an T˜10,000 K accretion hot spot on the K secondary.
This makes it possible to study the mass transfer and accretion phenomena without the confusing picture of winds, downflows and disk effects present in classical T Tauri stars.
We show evidence for evolution of the light curve morphology which we interpret as being due to changes in the starspot locations on the primary star. From a times of minima analysis, we present evidence for continued period decrease in this system due to mass transfer from the primary to secondary.

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