Artykuł w czasopiśmie
Brak miniatury
Licencja
CC-BYCC-BY - Uznanie autorstwa
 

An Isolated Mass-gap Black Hole or Neutron Star Detected with Astrometric Microlensing

Uproszczony widok
cris.lastimport.scopus2024-02-12T20:22:00Z
dc.abstract.enWe present the analysis of five black hole candidates identified from gravitational microlensing surveys. Hubble Space Telescope astrometric data and densely sampled light curves from ground-based microlensing surveys are fit with a single-source, single-lens microlensing model in order to measure the mass and luminosity of each lens and determine if it is a black hole. One of the five targets (OGLE-2011-BLG-0462/MOA-2011-BLG-191 or OB110462 for short) shows a significant >1 mas coherent astrometric shift, little to no lens flux, and has an inferred lens mass of 1.6-4.4 M <SUB>⊙</SUB>. This makes OB110462 the first definitive discovery of a compact object through astrometric microlensing and it is most likely either a neutron star or a low-mass black hole. This compact-object lens is relatively nearby (0.70-1.92 kpc) and has a slow transverse motion of <30 km s<SUP>-1</SUP>. OB110462 shows significant tension between models well fit to photometry versus astrometry, making it currently difficult to distinguish between a neutron star and a black hole. Additional observations and modeling with more complex system geometries, such as binary sources, are needed to resolve the puzzling nature of this object. For the remaining four candidates, the lens masses are <2M <SUB>⊙</SUB>, and they are unlikely to be black holes; two of the four are likely white dwarfs or neutron stars. We compare the full sample of five candidates to theoretical expectations on the number of black holes in the Milky Way (~10<SUP>8</SUP>) and find reasonable agreement given the small sample size.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorWyrzykowski, Łukasz
dc.contributor.authorSkowron, Jan
dc.contributor.authorPoleski, Radosław
dc.contributor.authorSzymański, Michał
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorBennett, David P.
dc.contributor.authorLam, Casey Y.
dc.contributor.authorLu, Jessica R.
dc.contributor.authorBond, Ian
dc.contributor.authorBarry, Richard
dc.contributor.authorKirikawa, Rintaro
dc.contributor.authorToda, Taiga
dc.contributor.authorAgarwal, Shrihan
dc.contributor.authorAbrams, Natasha S.
dc.contributor.authorTerry, Sean K.
dc.contributor.authorVandorou, Aikaterini
dc.contributor.authorKondo, Iona
dc.contributor.authorAbe, Fumio
dc.contributor.authorTristram, Paul J.
dc.contributor.authorRose, Sam
dc.contributor.authorSumi, Takahiro
dc.contributor.authorBhattacharya, Aparna
dc.contributor.authorYama, Hibiki
dc.contributor.authorSilva, Stela Ishitani
dc.contributor.authorMiyazaki, Shota
dc.contributor.authorSuzuki, Daisuke
dc.contributor.authorRanc, Clément
dc.contributor.authorKoshimoto, Naoki
dc.contributor.authorItow, Yoshitaka
dc.contributor.authorOkamura, Arisa
dc.contributor.authorFujii, Hirosane
dc.contributor.authorHirao, Yuki
dc.contributor.authorMuraki, Yasushi
dc.contributor.authorRattenbury, Nicholas J.
dc.contributor.authorFukui, Akihiko
dc.contributor.authorOlmschenk, Greg
dc.contributor.authorMatsumoto, Sho
dc.contributor.authorMatsubara, Yutaka
dc.contributor.authorHosek, Matthew W.
dc.contributor.authorSatoh, Yuki
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorMróz, Przemysław
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorSoszyński, Igor
dc.date.accessioned2024-01-24T16:43:19Z
dc.date.available2024-01-24T16:43:19Z
dc.date.copyright2022-07-06
dc.date.issued2022
dc.description.accesstimeAT_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number1
dc.description.versionFINAL_PUBLISHED
dc.description.volume933
dc.identifier.doi10.3847/2041-8213/AC7442
dc.identifier.issn2041-8205
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/100933
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2022ApJ...933L..23L
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstrophysical Journal Letters
dc.relation.pagesL23
dc.rightsCC-BY
dc.sciencecloudnosend
dc.titleAn Isolated Mass-gap Black Hole or Neutron Star Detected with Astrometric Microlensing
dc.typeJournalArticle
dspace.entity.typePublication