An Almanac of Predicted Microlensing Events for the 21st Century

• Autorzy: Bramich D. M. , Nielsen M. B.

Identyfikatory

DOI

10.32023/0001-5237/68.3.1

• Języki publikacji: EN

Abstrakty

EN

Using Gaia data release 2 (GDR2), we present an almanac of 2509 predicted microlensing events, caused by 2130 unique lens stars, that will peak between July 25, 2026 and the end of the century. This work extends and completes a thorough search for future microlensing events initiated by Bramich and Nielsen using GDR2. The almanac includes 161 lenses that will cause at least two microlensing events each. A few highlights are presented and discussed, including: (i) an astrometric microlensing event with a peak amplitude of ≈9.7 mas, (ii) an event that will probe the planetary system of a lens with three known planets, and (iii) an event (resolvable from space) where the blend of the lens and the minor source image will brighten by a detectable amount (≈2 mmag) due to the appearance of the minor source image. All of the predicted microlensing events in the almanac will exhibit astrometric signals that are detectable by observing facilities with an angular resolution and astrometric precision similar to, or better than, that of the Hubble Space Telescope (e.g., NIRCam on the James Webb Space Telescope), although the events with the most extreme source-to-lens contrast ratios may be challenging. Ground-based telescopes of at least 1 m in diameter can be used to observe many of the events that are also expected to exhibit a photometric signal.

Słowa kluczowe

EN

gravitational lensing: micro; methods: data analysis; catalogs; astrometry; stars: fundamental parameters

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2018
• Tom: Vol. 68, No. 3
• Strony: 183--203
• Opis fizyczny: Bibliogr. 51 poz., tab., wykr.

Twórcy

autor

Bramich D. M.

• New York University Abu Dhabi, PO Box 129188, Saadiyat Island, Abu Dhabi, UAE

autor

Nielsen M. B.

• Center for Space Science, NYUAD Institute, New York University Abu Dhabi, PO Box 129188, Abu Dhabi, UAE

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).