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Binary Lenses in OGLE-III EWS Database. Seasons 2006--2008

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arxiv 1009.5563 v1 pith:HV2GCNN2 submitted 2010-09-28 astro-ph.GA

M. Jaroszynski , J. Skowron , A. Udalski , M. Kubiak , M.K. Szymanski , G. Pietrzynski , I. Soszynski , L. Wyrzykowski
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K. Ulaczyk R. Poleski
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classification astro-ph.GA
keywords binaryogle-iiistellarbinariescandidatesdatabaselensmass
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We present 27 binary lens candidates from OGLE-III Early Warning System database for the seasons 2006--2008. The candidates have been selected by visual light curves inspection. Our sample of binary lens events consists now of 78 stellar systems and 7 extrasolar planets of OGLE-III published elsewhere. Examining the distribution of stellar binaries we find that the number of systems per logarithmic mass ratio interval increases with mass ratio q, in contradiction with our previous findings. Stellar binaries belong to the region 0.03<q<1 and there is a gap between them and a separate population of planets.

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  1. Assessing the Impact of Binary Systems on Microlensing Using SPISEA and PopSyCLE Population Simulations

    astro-ph.SR 2025-01 conditional novelty 6.0 of 10

    Adding binary and triple systems to microlensing population simulations predicts that 55% of OGLE-like events involve a multiple system, most of which masquerade as single-star events.

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