List of some black holes
Thislist ofblack holes (andstars considered probable candidates) is organized by mass (including black holes of undetermined mass); some items in this list aregalaxies orstar clusters that are believed to be organized around a black hole.Messier andNew General Catalogue designations are given where possible.
Supermassive black holes and candidates [ edit ] Intermediate-mass black holes and candidates [ edit ] Stellar black holes and candidates [ edit ] Black holes detected by gravitational wave signals [ edit ] As of February 2019[update] , 10 mergers of binary black holes have been observed. In each case two black holes merged to a larger black hole. In addition, oneneutron star merger has been observed (GW170817 ), forming a black hole. In addition, over 30 alerts have been issued since April 2019, of black hole merger candidates.
Multiple black hole systems [ edit ] In addition, the signal of several binary black holes merging into a single black hole and in so doing producinggravitational waves have been observed by theLIGO instrument. These are listed above in the sectionBlack holes detected by gravitational wave signals .
Trinary black holes [ edit ] As of 2014, there are 5 triple black hole systems known.[ 25]
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