Microlensing by single black-holes in the Galaxy
{\L}ukasz Wyrzykowski, Zuzanna Kostrzewa-Rutkowska, Krzysztof Rybicki
TL;DR
This paper analyzes long-duration microlensing events to estimate the mass and distance of lenses, identifying potential stellar-mass black holes and discussing how Gaia's astrometry will improve mass measurements of remnants.
Contribution
It presents the first mass function of lensing objects in the Milky Way and identifies candidates for stellar-mass black holes from microlensing data.
Findings
Derived the mass function of lensing objects in the Milky Way.
Identified candidates for stellar-mass black holes.
Discussed how Gaia astrometry will enhance remnant mass measurements.
Abstract
The longest microlensing events provide enough information to estimate the mass and distance of the lens. Among hundreds of millions of stars which were monitored for many years by the OGLE project we selected those with clear parallax effect and derived the mass function of lensing objects in the Milky Way. We also found candidates for microlensing stellar-mass single black holes. We discuss how Gaia superb astrometry will help in measuring masses of remnants in currently on-going and future microlensing events.
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Taxonomy
TopicsAdaptive optics and wavefront sensing · Astronomy and Astrophysical Research · Astrophysical Phenomena and Observations