The researchers are excited to find the most massive black hole ever measured.
#Largest black hole series
This series of mergers also created the black hole in its center, a monster about as big as our solar system but with the mass of 40 billion suns. Pairs of spiral galaxies form elliptical galaxies, pairs of those ellipticals form cored elliptical galaxies, and a pair of cored galaxies formed Holm 15A. That would mean Holm 15A probably formed from the combination of eight smaller spiral galaxies over billions of years. The authors of the new study found that Holm 15A, the enormous galaxy at the center of its home galaxy cluster, must have formed from yet another merger of two already-huge cored elliptical galaxies. Astronomers call these huge elliptical galaxies with faint centers “cored galaxies.” Massive cored galaxies often sit in the centers of galaxy clusters. The resulting extra-large elliptical galaxy usually doesn’t have much gas from which to form new stars, so its center looks pretty bare after its black hole kicks out nearby stars. Their central black holes combine as well and make larger black holes, which can kick huge swaths of nearby stars out to the edges of the newly formed galaxy. In crowded environments like galaxy clusters, these elliptical galaxies can collide and merge again to form an even larger elliptical galaxy. When two spiral galaxies - like our Milky Way and the nearby Andromeda Galaxy - collide, they can merge and form an elliptical galaxy.
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