Predictions of Gaia’s prize microlensing events are flawed
| العنوان: | Predictions of Gaia’s prize microlensing events are flawed |
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| المؤلفون: | Peter McGill, Leigh C. Smith, Douglas Boubert, Andrew Everall |
| المصدر: | Monthly Notices of the Royal Astronomical Society: Letters. 498:L6-L10 |
| بيانات النشر: | Oxford University Press (OUP), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Physics, 010308 nuclear & particles physics, FOS: Physical sciences, Astronomy and Astrophysics, Astrometry, Astrophysics, Gravitational microlensing, Astrophysics - Astrophysics of Galaxies, 01 natural sciences, Duplicate detection, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), 0103 physical sciences, Astrophysics - Instrumentation and Methods for Astrophysics, Spurious relationship, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, Data release, Solar and Stellar Astrophysics (astro-ph.SR), Event (probability theory) |
| الوصف: | Precision astrometry from the second Gaia data release has allowed astronomers to predict 5,787 microlensing events, with 528 of these having maximums within the extended Gaia mission (J2014.5 - J2026.5). Future analysis of the Gaia time-series astrometry of these events will, in some cases, lead to precise gravitational mass measurements of the lens. We find that 61% of events predicted during the extended Gaia mission with sources brighter than G = 18 are likely to be spurious, with the background source in these cases commonly being either a duplicate detection or a binary companion of the lens. We present quality cuts to identify these spurious events and a revised list of microlensing event candidates. Our findings imply that half of the predictable astrometric microlensing events during the Gaia mission have yet to be identified. Comment: 5 pages, 4 figures, Accepted, MNRAS Letters |
| تدمد: | 1745-3933 1745-3925 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b39a1bc6f35857d56524c6efa60589e https://doi.org/10.1093/mnrasl/slaa118 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....7b39a1bc6f35857d56524c6efa60589e |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 17453933 17453925 |
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