|Title:||Search for future microlensing events|
|Authors:||Tushar Goyal, Author|
|Material Type:||ISU Individual Project|
|Publisher:||Illkirch-Graffenstaden (France) : International Space University, 2022|
|Size:||1 electronic resource (37 p.) / col. ill.|
|Bibliography note:||Includes bibliographical references|
Gravitational microlensing is a highly effective & powerful tool in modern astronomy to study distant galaxies, detect extrasolar planets, black holes & quasars, and determine the mass of stellar objects. Therefore, predicting future microlensing events is essential to be observed at the exact moment they are happening to extract useful information. This project aims to find future microlensing events using Gaia eDR3.
A sample of 563,150 stars as potential lenses was obtained from 1.49 billion sources of Gaia eDR3, which satisfy: (1) Total proper motion>100mas/yr, (2) Relative Parallax>5 mas, (3) RUWE<2, (4) Gmag ≠ none. Then background sources were selected close to their paths. Finally, the future positions of lenses and sources were forecasted to determine epoch and angular separation at the closest approach.
A final data sample of 120,172 was selected with lenses having a background source in the vicinity of 5 arcseconds. A nested interval algorithm was created with Python to obtain a list of future microlensing events between 2016 and 2076. Also, past microlensing events were predicted from 1996 to 2016. Finally, a graphical user interface was created to facilitate further prediction of these events and was published on GitHub to be publicly accessed.
|ISU program :||Master of Space Studies|
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