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SUMMARY:The first low-mass\, pre-main sequence eclipsing binary with evide
 nce of a circumbinary disk - Ed Gillen (Cambridge)
DTSTART:20160120T160000Z
DTEND:20160120T170000Z
UID:TALK63347@talks.cam.ac.uk
CONTACT:Dr B.-O. Demory
DESCRIPTION:I will present a new double-lined\, detached eclipsing binary\
 , which comprises two pre-main sequence M dwarfs and shows evidence of a c
 ircumbinary disk. There is wealth of data\, obtained in a coordinated mann
 er\, with which to analyse the system: CoRoT and Spitzer light curves\, CF
 HT/MegaCam photometry\, and VLT/FLAMES spectroscopy. Together\, these allo
 w us to disentangle the different contributions to the observed variabilit
 y. The system’s spectral energy distribution (SED) shows a mid-infrared 
 excess that can be modelled as thermal emission from dust in the inner cav
 ity of a circumbinary disk. Additionally\, the CoRoT and Spitzer light cur
 ves contain large-amplitude\, rapidly evolving out-of-eclipse variations\,
  which might be due in part to occultations of the central stars by materi
 al located at the inner edge or in the central cavity of the circumbinary 
 disk. This unique system\, which could be a precursor of the circumbinary 
 planetary systems discovered by Kepler\, enables us to test evolutionary m
 odels of low mass stars\, and the interaction between a close binary and a
  circumbinary disk.
LOCATION:Martin Ryle Seminar Room\, Kavli Institute
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