Other
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21915344m&link_type=abstract
American Astronomical Society, AAS Meeting #219, #153.44
Other
Scientific paper
We are currently involved in a program to obtain precise photometry of eclipsing binaries with NASA's Kepler Observatory. Using Kepler's unprecedented accuracy and continuous observations, our goal is to search for variations in the eclipse times as a means of finding distant low mass companions to the central binary. In order to constrain the masses of any such companions, precise masses and other parameters of the central binary are needed. We have conducted several observing runs at KPNO and Lowell Observatory to obtain blue spectra of these systems, that when combined with photometry from Kepler, will yield joint radial velocity and light curve solutions. Here we present initial results from our sample of 41 eclipsing binaries, including double-lined radial velocity curves and the orbital fit parameters derived from our spectroscopic observations. In addition, we use Doppler tomography to reconstruct the spectra of the individual components of each binary. These spectra are then fit with synthetic spectra from model atmospheres to determine temperatures, gravities, and metallicities for the central binary. This work was funded in part by NASA grants NNX10AC39G and NNX11AB70G.
Gies Douglas R.
Guo Zhi
Matson Rachel A.
Williams Jeffress S.
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