Close Binaries Distribution From Mavels First Two Year Survey

Details Close Binaries Distribution From Mavels First Two Year Survey Close Binaries Distribution From Mavels First Two Year Survey

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21733412m&link_type=abstract

American Astronomical Society, AAS Meeting #217, #334.12; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

The SDSS-III MARVELS survey is a comprehensive radial velocity survey of 10,000 nearby F-K stars, between 7.6 < V < 12.0. In the first two years approximately 2000 stars have been monitored for signs of radial velocity variability. One of the defining features of this survey is that the observed stars were drawn from a homogeneous sample. Furthermore, the radial velocity observations are independent of the variability of the observed object, thus creating a sample that is unbiased in the time-domain. This makes it uniquely suited to constrain theoretical models regarding the formation of companions and looking at the overall distribution of radial velocity variable objects (Armitage 2007). A survey of this size allows for a detailed analysis of the distribution of close binaries (with Period < 180 day). During the first two years of the six year MARVELS project, approximately 2,000 stars were searched for binaries from 1 to 180 days using a modified Lomb-Scargle periodogram. Here we will present the preliminary results of an on-going project aimed at deriving the mass ratio and period distribution of close binaries from the first two years of MARVELS survey data.

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