Astronomers have discovered a giant black hole the size of two-thirds the mass of all stars in Γαλαξία. This black hole is forty billion times its mass sun, which basically means that it can hold 40 billions of suns, like the one in our solar system system.
But we need not fear, as this black hole is located over 700 millions of light years away from planet us. In particular, the researchers found it in Holmberg 15A, a giant galaxy in the center of a galaxy cluster called Abell 85.
How was the largest black hole ever discovered?
As one publication reports Max Planck Institute for Extraterrestrial Physics, The researchers were able to discover the black hole when they observed the unevenness in the brightness of the galaxy.
The Holmberg 15A is an elliptical galaxy, meaning that it is formed by the collision or merger of two large galaxies. Given its colossal size, the galaxy should emit a lot of light, but it doesn't. On the contrary, the center of the galaxy was highly indistinguishable, leading scientists to conclude that there is a giant black hole there.
Using them data from the USM Wendelstein Observatory and the MUSE spectrometer on the VLT, astronomers were able to determine the size of the black hole, which has a "mass of 40 billions of solar masses."
This discovery, in addition to impressive, also adds support to the current methodology for finding distant black holes.
"With each merger, the black hole gains mass and the center of the galaxy loses stars. Astronomers could use this relationship for estimates of masses of black holes in more distant galaxies where direct measurements of stellar motions close enough to the black hole are not possible. "
It seems that 2019 is the year of the black holes, since some time ago, the public was able to see the first image of a black hole, a light disk of gas and dust with a dark center. It is located in the Messier 87 galaxy, which is 55 millions of light-years from Earth.
Recently, scientists have discovered a whole new class of unexplored black holes using a new technique, which will now become the basis for the discovery of millions of other black holes in the universe.
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