Brown dwarf companions in microlensing binaries detected during the 2016–2018 seasons
نویسندگان
چکیده
Aims. With the aim of finding microlensing binaries containing brown dwarf (BD) companions, we investigate survey data collected during 2016–2018 seasons. Methods. For this purpose, first modeled lensing events with light curves exhibiting anomaly features that are likely to be produced by binary lenses. We then sorted out BD companion binary-lens applying criterion companion-to-primary mass ratio is q ≲ 0.1. procedure, identify six candidate companions: OGLE-2016-BLG-0890L, MOA-2017-BLG-477L, OGLE-2017-BLG-0614L, KMT-2018-BLG-0357L, OGLE-2018-BLG-1489L, and OGLE-2018-BLG-0360L. Results. estimated masses companions conducting Bayesian analyses using observables individual events. According estimation lens masses, probabilities for OGLE-2016-BLG-0890, OGLE-2017-BLG-0614, OGLE-2018-BLG-1489, OGLE-2018-BLG-0360 in regime very high P > 80%. MOA-2017-BLG-477 KMT-2018-BLG-0357, relatively low = 61% 69%, respectively.
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics
سال: 2022
ISSN: ['0004-6361', '1432-0746']
DOI: https://doi.org/10.1051/0004-6361/202244186