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Probing Galactic Black Holes with Microlensing with Gaia and OGLE

Published online by Cambridge University Press:  29 August 2019

Ł. Wyrzykowski ,
K. A. Rybicki ,
K. Kruszyńska ,
M. Gromadzki ,
P. Zieliski ,
Z. Kostrzewa-Rutkowska  and
S. T. Hodgkin
Ł. Wyrzykowski
Affiliation:
Warsaw University Astronomical Observatory, Warszawa, Poland email: lw@astrouw.edu.pl
K. A. Rybicki
Affiliation:
Warsaw University Astronomical Observatory, Warszawa, Poland email: lw@astrouw.edu.pl
K. Kruszyńska
Affiliation:
Warsaw University Astronomical Observatory, Warszawa, Poland email: lw@astrouw.edu.pl
M. Gromadzki
Affiliation:
Warsaw University Astronomical Observatory, Warszawa, Poland email: lw@astrouw.edu.pl
P. Zieliski
Affiliation:
Warsaw University Astronomical Observatory, Warszawa, Poland email: lw@astrouw.edu.pl
Z. Kostrzewa-Rutkowska
Affiliation:
SRON, Netherlands Institute for Space Research, Utrecht, the Netherlands Department of Astrophysics/IMAPP, Radboud University Nijmegen, the Netherlands
S. T. Hodgkin
Affiliation:
Institute of Astronomy, University of Cambridge, UK
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Abstract

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As shown by recent gravitational wave detections, galaxies harbour an unknown population of black holes at high masses. In our Galaxy such dark objects can be found and studied solely via gravitational microlensing methods. This paper described our search for black-hole lenses both in archived OGLE data and among on-going microlensing events found by OGLE and Gaia. That combination of superb time-domain astrometry and photometry will enable us to derive masses and distances to these dark lenses uniquely, and to describe the demographics of the unseen component of the Milky Way.

Keywords

Black hole physicssurveys

References

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