Searching for Tertiary Companions to Eclipsing Binary Systems in the LMC

Details Searching for Tertiary Companions to Eclipsing Binary Systems in the LMC Searching for Tertiary Companions to Eclipsing Binary Systems in the LMC

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aps..4cf.f1036m&link_type=abstract

American Physical Society, Four Corners Section of the APS Fall Meeting, October 6-7, 2006, abstract #F1.036

Physics

Scientific paper

We use a new method to search for possible tertiary companions to EB's in the MaCHO database. By binning the light-curve data and averaging the magnitude, we derive an average light curve by linear interpolation. This curve is directly compared to the observed data. The O-C phase is determined by subtracting the phase of a data point from the phase when the average curve has the same magnitude. This is done for both the primary and secondary eclipses. The O-C data are then plotted as a function of time. We use a Lomb periodogram to search the O-C data for high power signatures in a range of frequencies, yielding periods of possible tertiary companions. We phase-fold the O-C data obtained from both red and blue filters. We currently observe the signature sinusoidal variations of a tertiary companion in two systems for both wavelengths. We suspect that these two objects are stellar in nature.

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