TON 618 is estimated to have a mass of 66 billion times that of our sun. TON 618 is estimated to be more than 10 billion light-years away Holm 15A is only 700 million light-years away. Going fast!Įditor’s Note: Shout-out to Andy Briggs, who pointed out that a black hole in the very distant universe – in the very luminous quasar TON 618 – is even more massive than the black hole in Holmberg 15A. Read more via Max Planck Institute for Extraterrestrial PhysicsĮarthSky 2020 lunar calendars are available! They make great gifts. īut we already had some idea of the size of the black hole in this particular galaxy, so we tried it. There are only a few dozen direct mass measurements of supermassive black holes, and never before has it been attempted at such a distance. Astronomer Jens Thomas of MPE, who led the study, said: Measuring the motions of stars around a central black hole gives you a direct measurement of the black hole’s mass. The work let the team perform a mass estimate that was based directly on the stellar motions around the core of the galaxy. They also obtained spectrographic data using the Very Large Telescope in Chile. This central diffuse region in the galaxy is almost as large as the Large Magellanic Cloud, and this was a suspicious clue for the presence of a black hole with a very high mass.Īstronomers measured and evaluated the light coming from this region, using the Wendelstein Observatory in in the Bavarian Alps. This is why a joint group of astronomers at MPE and the University Observatory Munich got interested in the galaxy. In contrast to our Milky Way’s central black hole of about 4 million solar masses, the new record-holding central black hole in the galaxy Holm 15A is 40 billion times more massive than our sun.Įven though the central galaxy of the cluster Abell 85 has the enormous visible mass of about 2 trillion (10 12) solar masses in stars, the center of the galaxy is extremely diffuse and faint. It’s the central galaxy of the Abell 85 galaxy cluster. Holmberg 15A is a supergiant elliptical galaxy, some 700 million light-years from Earth. On the contrary, they noticed this black hole because it caused the center of its galaxy to be peculiarly fainter than it would be otherwise, given the galaxy’s huge mass of stars. They found it not because it’s doing something exotic or noticeable. The Max Planck Institute for Extraterrestrial Physics ( MPE) near Munich, Germany, said on December 3, 2019, that astronomers have set a new record for finding the most massive black hole in the nearby universe. Image via Matthias Kluge/ USM Wendelstein Observatory/ MPE.
Astronomers peered into its heart to measure the mass of a black hole 40 billion times more massive than our sun. The bright one in the center is called Holm 15A. This galaxy cluster – Abell 85 – consists of more than 500 individual galaxies.
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