An Isolated Stellar-mass Black Hole Detected through Astrometric Microlensing

  title={An Isolated Stellar-mass Black Hole Detected through Astrometric Microlensing},
  author={Kailash C. Sahu and Jay Anderson and Stefano Casertano and Howard E. Bond and Andrzej Udalski and Martin Dominik and Annalisa Calamida and Andrea Bellini and Thomas M. Brown and Marina Rejkuba and Varun Bajaj and No{\'e} Kains and Henry C. Ferguson and Chris L. Fryer and Ph. Yock and Przemek Mr{\'o}z and Szymon Kozłowski and Paweł Pietrukowicz and Radek Poleski and Jan Skowron and Igor Soszyński and Michał K. Szymański and Krzysztof Ulaczyk and Lukasz Wyrzykowski and Jean Philippe Beaulieu and Jean Baptiste Marquette and Andrew A. Cole and Kym Hill and Stefan W. Dieters and Ch. Coutures and Dijana Dominis-Prester and Etienne Bachelet and John W Menzies and Michael D. Albrow and Karen Pollard and A. Gould and Jennifer C. Yee and William Allen and Leonardo A. Almeida and Grant W. Christie and John Drummond and Avishay Gal-yam and Evgeny Gorbikov and Francisco Jablonski and Chung-Uk Lee and Dan Maoz and Ilan Manulis and J. Mccormick and Tim Natusch and Richard W. Pogge and Yossi Shvartzvald and Uffe G. J{\o}rgensen and Khalid Alsubai and Michael I. Andersen and Valerio Bozza and Sebastiano Calchi Novati and Tobias C. Hinse and M. Hundertmark and T.-O. Husser and Eamonn Kerins and Pen{\'e}lope Longa-Pe{\~n}a and Luigi Mancini and Matthew T. Penny and Sohrab Rahvar and D. Ricci and Sedighe Sajadian and Jesper F. Skottfelt and Colin Snodgrass and John Southworth and J Tregloan-Reed and Joachim Wambsganss and O. Wertz and Yiannis Tsapras and Rachel A. Street and D. M. Bramich and Keith D. Horne and Iain A. Steele STScI and Psu and University of Warsaw and University of St. Andrews and Eső and Univ. of British Columbia and Los Alamons Nat. Lab. and University of Auckland and University of Warwick and 1 Univ. Tasmania and Iap Paris and Univ. Bordeaux and Natsuyama Japan and Las Cumbres Obs. and Saao and South Africa and University of Canterbury and New Zealand. and Max-Planck-Inst. and Heidelberg and Ohio state Univ. and Cfa and Cambridge and Vintage Lane Obs and Universidad de Valencia and Spain and Auckland Obs. New Zealand and Possum Obs. New Zealand and Univ. Southern Queensland and Australia. and Weizmann Inst of Sci and Israel and Tel Aviv Univ. and K. A. Wills Astron and Sp Sci Institute and Weizmann Inst of Sci and Farm Cove Obs and Irasr and University of Copenhagen and Denmark and Qeeri and Doha and Qatar and University of Salerno and Italy and Istit. Naz. Fis. Nucl. and Napoli and Ipac and Pasadena and Inst. Astron. and Toruń and Poland and Chungnam Nat. Univ. and South Korea and University of Heidelberg and H Germany and University of Gottingen and Jodrell Bank Centre Astroph. and Manchester and UK. and Universidad de Antofagasta and Chile. and University of Rome and -INAF and Turin and Louisiana State Univ. and Baton Rouge and Usa and Sharif Univ. of Tech and Tehran and Iran and Padova and Isfahan Univ. Tech. and Isfahan and Open University and Milton Keynes and University of Edinburgh and Keele Univ. and Staffordshire and Universidad de Atacama and Universit'e de Liege and Belgium and Nyu Abu Dhabi and Uae and Liverpool John Moores Univ. and Ogle Collaboration and PLANETRoboNET Collaboration and microFUN Collaboration and MiNDSTEp Consortium and RoboNet Collaboration},
  journal={The Astrophysical Journal},
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 (t E ≃ 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… 

Snowmass2021 Cosmic Frontier White Paper: Probing dark matter with small-scale astrophysical observations

The current understanding of dark matter comes largely from measurements of the total matter content in the universe, from the distribution of gravitating matter on very large scales, and from

Effects of Hawking evaporation on PBH distributions

Primordial black holes (PBHs) may lose mass by Hawking evaporation. For sufficiently small PBHs, they may lose a large portion of their formation mass by today, or evaporate completely if they form

X-Ray Observations of the Isolated Black Hole Candidate OGLE-2011-BLG-0462 and Other Collapsed Objects Discovered through Gravitational Microlensing

Isolated black holes and neutron stars can be revealed through the observation of long-duration gravitational microlensing events. A few candidates have been found in surveys of stars in the

Systematic Errors as a Source of Mass Discrepancy in Black Hole Microlensing Event OGLE-2011-BLG-0462

Two independent groups reported the discovery of an isolated dark stellar remnant in the microlensing event OGLE-2011-BLG-0462 based on photometric ground-based observations coupled with astrometric

A Robust Test of the Existence of Primordial Black Holes in Galactic Dark Matter Halos

If very low mass primordial black holes (PBH) within the asteroid/moon-mass range indeed reside in galactic dark matter halos, they must necessarily collide with galactic neutron stars (NSs). These

Astrometric Microlensing of Primordial Black Holes with Gaia

. The Gaia space telescope allows for unprecedented accuracy for astrometric measurements of stars in the Galaxy. In this work, we explore the sensitivity of Gaia to detect primordial black hole

Calibration-TOM: managing calibration observations for a global network of telescopes

Las Cumbres Observatory comprises 25 robotic telescopes hosting 6 instrument types at 7 sites. To manage the calibrations for such a large suite of instruments, LCO has developed a Target and

Is there a nearby microlensing stellar remnant hiding in Gaia DR3 astrometry?

Galactic massive lenses with large Einstein Radius should cause a measurable astrometric microlensing e ff ect, i.e. the light centroid shift due to motion of two images. Such shift in the position of

Signatures of spin precession and nutation in isolated black-hole binaries

The spin precession of binary black holes (BBHs) that originate from isolated high-mass binary stars is determined by the interplay of phenomena such as tides, winds, accretion, common-envelope

Mass–Velocity Dispersion Relation by Using the Gaia Data and Its Effect on Interpreting Short-duration and Degenerate Microlensing Events

Gravitational microlensing, the lensing of stars in the Milky Way with other stars, has been used for exploring compact dark matter objects, exoplanets, and black holes. The duration of microlensing



Compact stellar X-ray sources

1. Accreting neutron stars and black holes: a decade of discoveries D. Psaltis 2. Rapid X-ray variability M. van der Klis 3. New views of thermonuclear bursts T. Strohmayer and L. Bildsten 4. Black

Life among the stars

WFC3 Instrument Science Report 2021-04 ( documentation/instrument-science-reports-isrs

  • 2021

Objects (New York: Wiley-Interscience)

  • 2016

Cygnus X-1 contains a 21–solar mass black hole—Implications for massive star winds

Radio astrometry is used to refine the distance to Cygnus X-1, a well-studied x-ray binary that contains a black hole with a high mass that challenges stellar evolution models, and raises the mass of the black hole in the system to 21 solar masses.

The Wolf–Rayet + Black Hole Binary NGC 300 X-1: What is the Mass of the Black Hole?

We present new X-ray and UV observations of the Wolf–Rayet + black hole (BH) binary system NGC 300 X-1 with the Chandra X-ray Observatory and the Hubble Space Telescope Cosmic Origins Spectrograph.

The relationship between infrared, optical, and ultraviolet extinction

The parameterized extinction data of Fitzpatrick and Massa (1986, 1988) for the ultraviolet and various sources for the optical and near-infrared are used to derive a meaningful average extinction

Modeling the Evolution of Disk Galaxies. II. Yields of Massive Stars

Checking stellar yields with galactic chemical evolution models is an important test of stellar nucleosynthesis simulations. This is generally done by applying a very simple galactic model with a