Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21943810m&link_type=abstract
American Astronomical Society, AAS Meeting #219, #438.10
Astronomy and Astrophysics
Astronomy
Scientific paper
We obtained photometry from the Mount Laguna Observatory 1 meter telescope and the radial velocities using the 9 meter Hobby-Eberly Telescope to perform a study of the partially eclipsing binary star V15 in the old ( 6 Gyr) open star cluster Berkeley 39. Eclipsing binaries can often provide the opportunity to measure stellar masses and radii to a precision of 1%, and when one of the stars is evolving, a precise radius measurement can lead to a precise age determination (10% or better). The more massive star in the binary is on the subgiant branch and rapidly evolving, which will allow us to provide a precise new determination of the age of Berkeley 39. The fainter star in the binary has almost the same mass as the Sun, which can give us an idea of what the Sun will look like in 1-2 Gyr. We gratefully acknowledge support from The National Science Foundation for E.J.M as part of the REU program at San Diego State University under grant AST-0850564 and to E.L.S under grant AST-0908536.
Gonzalez Carlos
Martin Emily
Orosz Jerome
Sandquist Eric
Shetrone Matthew
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