Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21915335f&link_type=abstract
American Astronomical Society, AAS Meeting #219, #153.35
Astronomy and Astrophysics
Astronomy
Scientific paper
We present a new, detached eclipsing binary (EB) as part of an on-going project to study long-period EBs via spectroscopic binaries (SBs) observed during the MARVELS survey. MARVELS is a multi-object radial velocity (RV) exoplanet search whose primary objective is to homogeneously study exoplanets, but it also observes several hundred SBs as part of its operation. The project starts with SB orbital solutions based on the MARVELS RVs and searches archival photometry to check for eclipses as an efficient means to identify and study long-period EBs. Here we show the first such example of this approach with an EB comprised of a G and K dwarf on an orbital period of 9.67888 days. The eclipsing nature was identified using publically available SuperWASP archival photometry phase-folded on the RV-determined orbital period. Follow-up Echelle observations with the HET telescope measured the fainter component's RVs and provide a measurement of the mass ratio to within 1%. This EB populates a poorly explored region of parameter space where a lack of precise mass and radius estimates exist for K and M dwarfs in EBs with P > 5 days.
Agol Eric
de Lee Nathan
Deshpande Rohit
Fleming Scott W.
Gaudi Scott
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