Microlensing optical depth and event rate in the OGLE-IV Galactic plane fields

Autor: Marcin Wrona, Patryk Iwanek, Igor Soszyński, Paweł Pietrukowicz, Przemek Mróz, Krzysztof Ulaczyk, Jan Skowron, Andrzej Udalski, Michał K. Szymański, Szymon Kozłowski, Krzysztof A. Rybicki, Mariusz Gromadzki, Radosław Poleski
Rok vydání: 2020
Předmět:
Milky Way
Astrophysics::High Energy Astrophysical Phenomena
FOS: Physical sciences
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Gravitational microlensing
01 natural sciences
Bulge
0103 physical sciences
010303 astronomy & astrophysics
Instrumentation and Methods for Astrophysics (astro-ph.IM)
Astrophysics::Galaxy Astrophysics
Solar and Stellar Astrophysics (astro-ph.SR)
Physics
010308 nuclear & particles physics
Galactic Center
Galactic anticenter
Astronomy and Astrophysics
Galactic plane
Astrophysics - Astrophysics of Galaxies
Gravitational lens
Astrophysics - Solar and Stellar Astrophysics
Space and Planetary Science
Astrophysics of Galaxies (astro-ph.GA)
Galactic coordinate system
Astrophysics::Earth and Planetary Astrophysics
Astrophysics - Instrumentation and Methods for Astrophysics
DOI: 10.48550/arxiv.2004.07289
Popis: Searches for gravitational microlensing events are traditionally concentrated on the central regions of the Galactic bulge but many microlensing events are expected to occur in the Galactic plane, far from the Galactic Center. Owing to the difficulty in conducting high-cadence observations of the Galactic plane over its vast area, which are necessary for the detection of microlensing events, their global properties were hitherto unknown. Here, we present results of the first comprehensive search for microlensing events in the Galactic plane. We searched an area of almost 3000 square degrees along the Galactic plane (|b
Comment: ApJS, in press
Databáze: OpenAIRE