Rogue black hole
{{Short description|Interstellar or intergalactic object}}File:Rogue black hole OGLE-2011-BLG-0462.gif observations of the gravitational microlensing of the interstellar MOA-2011-BLG-191/OGLE-2011-BLG-0462{{Cite web |last=Gianopoulos |first=Andrea |date=2022-06-07 |title=Hubble Determines Mass of Isolated Black Hole Roaming Our Milky Way Galaxy |url=http://www.nasa.gov/feature/goddard/2022/hubble-determines-mass-of-isolated-black-hole-roaming-our-milky-way-galaxy |access-date=2022-06-12 |website=NASA}}]]
A rogue black hole is a black hole that is not bound by any object's gravity, allowing them to float freely throughout the universe. Since black holes emit no light, the only ways to detect them are gravitational lensing or x-ray bursts that occur when they destroy an object.{{Cite news|last=Whitwam|first=Ryan|date=2022-02-08|title=Rogue Black Hole Observed for the First Time|website=ExtremeTech|url=https://www.extremetech.com/extreme/331414-rogue-black-hole-observed-for-the-first-time|access-date=2022-02-10}}
Intergalactic rogue black holes
These are objects without a host galactic group, caused by collisions between two galaxies or when the merging of two black holes is disrupted. It has been estimated that there could be 12 rogue supermassive black holes on the edge of the Milky Way galaxy.{{Cite web|author1=Ben Turner|date=2021-08-27|title=Rogue black holes could be wandering at the edges of the Milky Way|url=https://www.livescience.com/rogue-black-holes-lurking.html|access-date=2022-02-10|website=LiveScience|language=en}}
Interstellar rogue black holes
= Examples =
In January 2022, a team of astronomers reported of OGLE-2011-BLG-0462/MOA-2011-BLG-191, the first unambiguous detection and mass measurement of an isolated stellar black hole using the Hubble Space Telescope together with the Microlensing Observations in Astrophysics (MOA) and the Optical Gravitational Lensing Experiment (OGLE).{{cite journal |last1=Sahu |first1=Kailash C. |last2=Anderson |first2=Jay |last3=Casertano |first3=Stefano |last4=Bond |first4=Howard E. |last5=Udalski |first5=Andrzej |last6=Dominik |first6=Martin |last7=Calamida |first7=Annalisa |last8=Bellini |first8=Andrea |last9=Brown |first9=Thomas M. |last10=Rejkuba |first10=Marina |last11=Bajaj |first11=Varun |last12=Kains |first12=Noe |last13=Ferguson |first13=Henry C. |last14=Fryer |first14=Chris L. |last15=Yock |first15=Philip |display-authors=1 |date=25 May 2022 |title=An Isolated Stellar-mass Black Hole Detected through Astrometric Microlensing |journal=The Astrophysical Journal |volume=933 |page=83 |arxiv=2201.13296 |bibcode=2022ApJ...933...83S |doi=10.3847/1538-4357/ac739e |last16=Mróz |first16=Przemek |last17=Kozłowski |first17=Szymon |last18=Pietrukowicz |first18=Paweł |last19=Poleski |first19=Radek |last20=Skowron |first20=Jan |last21=Soszyński |first21=Igor |last22=Szymański |first22=Michał K. |last23=Ulaczyk |first23=Krzysztof |last24=Wyrzykowski |first24=Łukasz |last25=Barry |first25=Richard |last26=Bennett |first26=David P. |last27=Bond |first27=Ian A. |last28=Hirao |first28=Yuki |last29=Ishitani Silva |first29=Stela |last30=Kondo |first30=Iona |last31=Koshimoto |first31=Naoki |last32=Ranc |first32=Clement |last33=Rattenbury |first33=Nicholas J. |last34=Sumi |first34=Takahiro |last35=Suzuki |first35=Daisuke |last36=Tristram |first36=Paul J. |last37=Vandorou |first37=Aikaterini |last38=Beaulieu |first38=Jean-Philippe |last39=Marquette |first39=Jean-Baptiste |last40=Cole |first40=Andrew |last41=Fouque |first41=Pascal |last42=Hill |first42=Kym |last43=Dieters |first43=Stefan |last44=Coutures |first44=Christian |last45=Dominis-Prester |first45=Dijana |last46=Bennett |first46=Clara |last47=Bachelet |first47=Etienne |last48=Menzies |first48=John |last49=Albrow |first49=Michael |last50=Pollard |first50=Karen |last51=Gould |first51=Andrew |last52=Yee |first52=Jennifer |last53=Allen |first53=William |last54=Andrade de Almeida |first54=Leonardo |last55=Christie |first55=Grant |last56=Drummond |first56=John |last57=Gal-Yam |first57=Avishay |last58=Gorbikov |first58=Evgeny |last59=Jablonski |first59=Francisco |last60=Lee |first60=Chung-Uk |last61=Maoz |first61=Dan |last62=Manulis |first62=Ilan |last63=McCormick |first63=Jennie |last64=Natusch |first64=Tim |last65=Pogge |first65=Richard W. |last66=Shvartzvald |first66=Yossi |last67=Jorgensen |first67=Uffe G. |last68=Alsubai |first68=Khalid A. |last69=Andersen |first69=Michael I. |last70=Bozza |first70=Valerio |last71=Calchi Novati |first71=Sebastiano |last72=Burgdorf |first72=Martin |last73=Hinse |first73=Tobias C. |last74=Hundertmark |first74=Markus |last75=Husser |first75=Tim-Oliver |last76=Kerins |first76=Eamonn |last77=Longa-Peña |first77=Penelope |last78=Mancini |first78=Luigi |last79=Penny |first79=Matthew |last80=Rahvar |first80=Sohrab |last81=Ricci |first81=Davide |last82=Sajadian |first82=Sedighe |last83=Skottfelt |first83=Jesper |last84=Snodgrass |first84=Colin |last85=Southworth |first85=John |last86=Tregloan-Reed |first86=Jeremy |last87=Wambsganss |first87=Joachim |last88=Wertz |first88=Olivier |last89=Tsapras |first89=Yiannis |last90=Street |first90=Rachel A. |last91=Bramich |first91=Daniel M. |last92=Horne |first92=Keith |last93=Steele |first93=Iain A. |issue=1 |s2cid=246430448 |doi-access=free }}{{Cite web|last=Browne|first=Ed|date=2022-02-08|title=First ever rogue black hole spotted zooming through space at 28 miles per second|url=https://www.newsweek.com/first-ever-rogue-isolated-black-hole-spotted-binary-explosion-study-1676325|access-date=2022-02-10|website=Newsweek|language=en}} This black hole is located 5,000 light-years away, has a mass 7.1 times that of the Sun, and moves at about 45 km/s.{{Cite web|last=Tomaswick|first=Andy|date=2022-02-06|title=The First Rogue Black Hole has Been Discovered, and it's Only 5,000 Light-Years Away|url=https://www.universetoday.com/154420/the-first-rogue-black-hole-has-been-discovered-and-its-only-5000-light-years-away/|access-date=2022-02-10|website=Universe Today|language=en-US}} While there have been other candidates, they have been detected more indirectly.{{Cite web |last=Bennett |first=Dave |date=2000-01-13 |title=Lone Black Holes Discovered Adrift in the Galaxy |url=http://hubblesite.org/contents/news-releases/2000/news-2000-03 |access-date=2022-06-12 |website=HubbleSite of NASA |language=en-US}}
See also
References
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