These are bigger than the class of ordinary black holes formed in the implosion of a single star
WASHINGTON - Astronomers have scrutinized a cluster of stars that is the apparent remnant core of a relatively small galaxy that was swallowed by the sprawling Milky Way 8 to 10 billion years ago. What lurks at the center of this cluster has them excited.
The cluster, called Omega Centauri, contains about 10 million stars. The black hole within it is at least 8,200 times as massive as our sun, the researchers said. This black hole is located about 17,700 light-years from Earth. A light-year is the distance light travels in a year, 5.9 trillion miles . The Milky Way's only larger-known black hole is Sagittarius A*, located about 26,700 light years from Earth.
But the galactic merger, which occurred when the Milky Way was about a quarter or third its current age, left the black hole frozen in time. "Intermediate-mass black holes have been suspected in the centers of low-mass galaxies or also in the center of certain star clusters. However, they have been very challenging to detect. Due to their lower mass with respect to supermassive black holes, their region of influence is small," Häberle said.
پاکستان تازہ ترین خبریں, پاکستان عنوانات
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