Astronomy and Astrophysics – Astronomy
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.1107b&link_type=abstract
American Astronomical Society, AAS Meeting #212, #11.07; Bulletin of the American Astronomical Society, Vol. 40, p.204
Astronomy and Astrophysics
Astronomy
Scientific paper
The low-mass end of the main sequence represents a large fraction of the population of the Galaxy, but is poorly constrained by theoretical models, largely because of the difficulty posed by the intrinsic faintness of these stars. Direct spectroscopic and photometric observations are needed to resolve the discrepancy between models and data. Large scale photometric surveys conducted over several epochs may be able to provide many low-mass eclipsing binary candidates that can then be monitored via photometry and spectroscopy. In this way, it is possible to obtain these stars' radii, luminosity, colors, masses, metallicities, and ages, and reconcile these with predictions from various theoretical models. In this work, we use photometric data collected by the SDSS-II Supernova Survey (2004-2007) along the Equatorial Stripe (RA between 22 h and 4 h, DEC between -1.27 deg and +1.27 deg) to identify a number of M-dwarf/M-dwarf eclipsing binary candidates. We describe our target selection algorithms, the ensemble photometry method employed to obtain differential light-curves of our targets, and the criteria used to select periodically varying objects that may be eclipsing binaries. Finally, we describe methods that deal with the difficulty posed by the sparse and uneven time-sampling of the survey data.
Based on data from the Sloan Digital Sky Survey (http://www.sdss.org). This research was supported by NASA grant NAG5-7697.
Bhatti Waqas
Ford Holland
Marcucci E.
Petro Larry
Richmond Michael
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