Supermassive black hole in the center of a small galaxy
A very strange phenomenon was discovered by astrophysicists from the University of Utah (and confirmed by an international team of researchers): this is a black hole in the center of the dwarf galaxy M60-UCD1. It used to be that black holes form only in the center of large galaxies, like our Milky Way. It turned out that this is not so: the diameter of the M60-UCD1 is only 157 light years, i.e. to 500 times smaller than the Milky Way!
M60-UCD1 is just one of the fifty known supercompact galaxies in the nearest galactic clusters, but it is one of the brightest and one of the densest galaxies in its class. Compared with ours, then in M60-UCD1 the stars are 25 times denser than ours.
“It's like a pinhole in the sky,” said lead researcher Anil Seth from the University of Utah during an online press conference on September 16th. He said suspicions of a phenomenon inside the galaxy M60-UCD1 appeared after he saw data on the motion of stars in M60-UCD1, obtained from the Gemini Observatory in Hawaii. Stars closer to the center moved much faster than the extreme ones.
M60-UCD1 revolves around the “mother” galaxy M60 at a distance of 22,000 light-years . The distance to the Earth is about 54 million light years. Now, the strange characteristics of the M60-UCD1 have become a little clearer, because the black hole in the center is 15% of its mass (2.1 × 10 7 solar masses). For comparison, our BH is less than 0.01% of the total mass.
The process of black hole formation in the center of galaxies is not completely clear.
The scientific work was published on September 17 in the journal Nature. Access to the article is paid, copy .
By the way, the gateway to bypass paid firewalls in scientific publishers Sci-Hub is not working now, a fundraiser is being made.