Long Period Eclipsing Binaries in the Magellanic Clouds: a Period-I Magnitude Relation

Details Long Period Eclipsing Binaries in the Magellanic Clouds: a Period-I Magnitude Relation Long Period Eclipsing Binaries in the Magellanic Clouds: a Period-I Magnitude Relation

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21823003d&link_type=abstract

American Astronomical Society, AAS Meeting #218, #230.03; Bulletin of the American Astronomical Society, Vol. 43, 2011

Computer Science

Artificial Intelligence

Scientific paper

The Eclipsing Binaries via Artificial Intelligence (EBAI) project (Prsa et al) generated solutions for eclipsing binaries in the Large Magellanic Cloud (LMC) as observed by the OGLE II project. Automatic clustering applied to the results highlighted that the LMC's long period (P>10d) detached (EA) binaries follow a linear relation in Period-I magnitude (Devinney et al). Subsequent analysis of OGLE II data for the Small Magellanic Cloud (SMC) has revealed a similar relationship.
The present relation is distinct from the Period-K band linear relation for LMC MACHO Project (Alcock et al) EBs as found by Wood et al, and discussed by Soszynski et al and Derekas et al. The Period-K band relation is convincingly modeled by invoking one EB component at the Roche lobe, whereas EBs in the Period-I magnitude relation reported here show minimal proximity effects and they are significantly fainter. We show that the Period-I magnitude relation is not a selection effect and weigh alternatives for its evolutionary basis.
We are grateful for the support of this research from NSF/RUI Grant AST-05-75042.

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