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The discovery of the supermassive black hole in Holm 15A follows research published in the Monthly Notices of the Royal Astronomical Society in 2018. It's 10.4 billion light-years away. A follow-up study of the cD galaxy Holm 15A in order to prove whether J004150 is a background source or a bound black hole, which could be tested by optical spectroscopy of J004150. Much like stars and planets, black holes also fall into different categories. Holm 15A* is estimated to have a mass 40 billion times that of the sun. For this, Holm 15A represents an ideal opportunity for testing the SMBH “scouring” scenario for the creation of BCG cores. The radius of the black hole is about radius is about 790 Astronomical unit (AU). Much like stars and planets, black holes also fall into different categories. Holm 15A is more than twice as large as the previous observed record-setter at 40 billion times the mass of the Sun, and 10,000 times the mass of the black hole at the core of the Milky Way. Now, it's not the most massive black hole ever detected - that would be the quasar TON 618, which apparently has a black hole clocking in at 66 billion times the mass of the Sun, based on indirect measurements.. It was discovered c. 1937 by Erik Holmberg. Holm 15A is a central elliptical galaxy within the Abell 85 cluster, which contains more than 500 galaxies. An ultramassive black hole clocking in at around 40 billion solar masses is at the heart of the galaxy Holm 15A, around 700 million light-years away. Astronomers have now spotted a record-breaking heavyweight black hole at the center of a galaxy known as Holm 15A… Holmberg 15A’s ultramassive black hole is estimated to have a mass of 40 billion times that of the Sun. Astronomers have now spotted a record-breaking heavyweight black hole at the center of a galaxy known as Holm 15A. And then there's the ultramassive black hole powering the quasar TON 618 - an absolute beast at 66 billion solar masses. Holmberg 15A is a supergiant elliptical galaxy and the central dominant galaxy of the Abell 85 galaxy cluster in the constellation Cetus, about 700 million light-years from Earth. This makes the Holm 15A black hole twice as big as the last record holder and 10,000 larger than the black hole in the center of our own Milky Way. The cluster is 700 million light-years from Earth —- that’s twice as far as the distance for other direct measurements of black hole mass. It briefly shot to fame when it was reported to have the largest core ever observed in a galaxy, spanning some 15,000 light years, however this was subsequently refuted. The black hole was spotted by using data from the Very Large Telescope array. It was found in Messier 87, a galaxy 55 million light-years away. The gargantuan black hole lurks in a galaxy that’s supermassive itself and probably formed from the collisions of at least eight smaller galaxies. But it was the center of Holm 15A … Black holes this size are called supermassive black holes, and only a few of these have been found. Event Horizon Telescope Collaboration, via National Science Foundation The first ever-image of a black hole, captured in April, 2019.

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