Detection of Contact Binaries

Details Detection of Contact Binaries Detection of Contact Binaries

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007dps....39.1609l&link_type=abstract

American Astronomical Society, DPS meeting #39, #16.09; Bulletin of the American Astronomical Society, Vol. 39, p.440

Astronomy and Astrophysics

Astronomy

Scientific paper

We show that candidate contact binary asteroids can be efficiently identified from sparsely sampled photometry taken at phase angles α>60°. At high phase angle, close/contact binary systems produce distinctive lightcurves that spend most of the time at maximum or minimum (typically >1 mag apart) brightness with relatively fast transitions between the two. This means that a few ( 5) sparse observations will suffice to measure the large range of variation and identify candidate contact binary systems. This finding can be used in the context of all-sky surveys to constrain the fraction of contact binary near-Earth objects. High phase angle lightcurve data can also reveal the absolute sense of the spin.

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