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Measuring the Mass Function of Isolated Stellar Remnants with Gravitational Microlensing I. Revisiting the OGLE-III Dark Lens Candidates

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dc.abstract.enGravitational microlensing may detect dark stellar remnants - black holes or neutron stars - even if they are isolated. However, it is challenging to estimate masses of isolated dark stellar remnants using solely photometric data for microlensing events. A recent analysis of OGLE-III long-timescale microlensing events exhibiting the annual parallax effects claimed that a number of bright events were due to mass-gap objects (with masses intermediate between those of neutron stars and black holes). Here, we present a detailed description of the updated and corrected method that can be used to estimate masses of dark stellar remnants detected in microlensing events given the light curve data and the proper motion of the source. We use this updated method, in combination with new proper motions from Gaia EDR3, to revise masses of dark remnant candidates previously found in the OGLE-III data. We demonstrate that masses of mass-gap and black hole events identified in the previous work are overestimated and, hence, these objects are most likely main-sequence stars, white dwarfs, or neutron stars.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorMróz, Przemysław
dc.contributor.authorWyrzykowski, Łukasz
dc.date.accessioned2024-01-25T11:25:51Z
dc.date.available2024-01-25T11:25:51Z
dc.date.copyright2021-07-29
dc.date.issued2021
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number2
dc.description.versionORIGINAL_AUTHOR
dc.description.volume71
dc.identifier.doi10.32023/0001-5237/71.2.1
dc.identifier.issn0001-5237
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/112185
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2021AcA....71...89M
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofActa Astronomica
dc.relation.pages89-102
dc.rightsOther
dc.sciencecloudnosend
dc.titleMeasuring the Mass Function of Isolated Stellar Remnants with Gravitational Microlensing I. Revisiting the OGLE-III Dark Lens Candidates
dc.typeJournalArticle
dspace.entity.typePublication