Searching the MaCHO Database for Tertiary Companions to Eclipsing Binaries

Details Searching the MaCHO Database for Tertiary Companions to Eclipsing Binaries Searching the MaCHO Database for Tertiary Companions to Eclipsing Binaries

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...203.1206p&link_type=abstract

American Astronomical Society Meeting 203, #12.06; Bulletin of the American Astronomical Society, Vol. 35, p.1222

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

The MaCHO database contains observations of more than 6000 eclipsing binary stars over an approximately eight year temporal baseline. We have selected a limited subset of these eclipsing binaries based on the period.
For each star, we search the data for drifts in the timing of the eclipse, potentially due to the presence of a perturbing companion. This companion would cause the center of mass of the system to shift, and therefore, cause the timing of the eclipse to shift. For a 1-Jupiter mass object in orbit around two 0.5 solar mass stars, the shift in the timing of the eclipse may be as much as one second.
We present our progress to date, as well as our model of the three body system. The model allows us to derive parameters of the system by fitting the drift in the eclipse timing. Finally, we present a discussion of possible confounding factors.
This poster utilizes public domain data obtained by the MACHO Project, jointly funded by the US Department of Energy through the University of California, Lawrence Livermore National Laboratory under contract No. W-7405-Eng-48, by the National Science Foundation through the Center for Particle Astrophysics of the University of California under cooperative agreement AST-8809616, and by the Mount Stromlo and Siding Spring Observatory, part of the Australian National University.

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