2022ApJ...933...83S

Query : 2022ApJ...933...83S

2022ApJ...933...83S - Astrophys. J., 933, 83-83 (2022/July-1)

An Isolated Stellar-mass Black Hole Detected through Astrometric Microlensing.

SAHU K.C., ANDERSON J., CASERTANO S., BOND H.E., UDALSKI A., DOMINIK M., CALAMIDA A., BELLINI A., BROWN T.M., REJKUBA M., BAJAJ V., KAINS N., FERGUSON H.C., FRYER C.L., YOCK P., MROZ P., KOZLOWSKI S., PIETRUKOWICZ P., POLESKI R., SKOWRON J., SOSZYNSKI I., SZYMANSKI M.K., ULACZYK K., WYRZYKOWSKI L. (The OGLE Collaboration), BARRY R.K., BENNETT D.P., BOND I.A., HIRAO Y., ISHITANI SILVA S., KONDO I., KOSHIMOTO N., RANC C., RATTENBURY N.J., SUMI T., SUZUKI D., TRISTRAM P.J., VANDOROU A. (The MOA Collaboration), BEAULIEU J.-P., MARQUETTE J.-B., COLE A., FOUQUE P., HILL K., DIETERS S., COUTURES C., DOMINIS-PRESTER D., BENNETT C., BACHELET E., MENZIES J., ALBROW M., POLLARD K. (The PLANET Collaboration), GOULD A., YEE J.C., ALLEN W., ALMEIDA L.A., CHRISTIE G., DRUMMOND J., GAL-YAM A., GORBIKOV E., JABLONSKI F., LEE C.-U., MAOZ D., MANULIS I., McCORMICK J., NATUSCH T., POGGE R.W., SHVARTZVALD Y. (The muFUN Collaboration), JORGENSEN U.G., ALSUBAI K.A., ANDERSEN M.I., BOZZA V., CALCHI NOVATI S., BURGDORF M., HINSE T.C., HUNDERTMARK M., HUSSER T.-O., KERINS E., LONGA-PENA P., MANCINI L., PENNY M., RAHVAR S., RICCI D., SAJADIAN S., SKOTTFELT J., SNODGRASS C., SOUTHWORTH J., TREGLOAN-REED J., WAMBSGANSS J., WERTZ O. (The MiNDSTEp Consortium), TSAPRAS Y., STREET R.A., BRAMICH D.M., HORNE K., STEELE I.A. (The RoboNet Collaboration)

Abstract (from CDS):

We report the first unambiguous detection and mass measurement of an isolated stellar-mass black hole (BH). We used the Hubble Space Telescope (HST) to carry out precise astrometry of the source star of the long-duration (tE ≃ 270 days), high-magnification microlensing event MOA-2011-BLG-191/OGLE-2011-BLG-0462 (hereafter designated as MOA-11-191/OGLE-11-462), in the direction of the Galactic bulge. HST imaging, conducted at eight epochs over an interval of 6 yr, reveals a clear relativistic astrometric deflection of the background star's apparent position. Ground-based photometry of MOA-11-191/OGLE-11-462 shows a parallactic signature of the effect of Earth's motion on the microlensing light curve. Combining the HST astrometry with the ground-based light curve and the derived parallax, we obtain a lens mass of 7.1 ± 1.3 M☉ and a distance of 1.58 ± 0.18 kpc. We show that the lens emits no detectable light, which, along with having a mass higher than is possible for a white dwarf or neutron star, confirms its BH nature. Our analysis also provides an absolute proper motion for the BH. The proper motion is offset from the mean motion of Galactic disk stars at similar distances by an amount corresponding to a transverse space velocity of ∼45 km s–1, suggesting that the BH received a "natal kick" from its supernova explosion. Previous mass determinations for stellar-mass BHs have come from radial velocity measurements of Galactic X-ray binaries and from gravitational radiation emitted by merging BHs in binary systems in external galaxies. Our mass measurement is the first for an isolated stellar-mass BH using any technique.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Black holes - Gravitational microlensing

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [BWF97] IC 10 X-1 HXB 00 20 29.03310480 +59 16 51.7609560           ~ 180 0
2 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
3 CXOU J005510.0-374212 HXB 00 55 09.990 -37 42 12.16     22.44     WNE 139 1
4 NAME M33 X-7 HXB 01 33 34.13 +30 32 11.3 17.50 18.80 18.70     O 187 2
5 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
6 EGGR 180 WD* 04 31 12.5714396826 +58 58 41.292707803 12.29 12.77   12.8   DC5 140 0
7 NAME Proxima Centauri PM* 14 29 42.9461331854 -62 40 46.164680672 14.21 12.95 11.13 9.45 7.41 M5.5Ve 1483 0
8 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0
9 OGLE-2014-BLG-1186 * 17 41 59.63 -34 17 18.1           ~ 3 0
10 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
11 OGLE-2011-BLG-0462 * 17 51 40.150 -29 53 26.15           ~ 41 0
12 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4590 0
13 NAME Local Group GrG ~ ~           ~ 9325 0
14 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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