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Space

A black hole one hundred times larger than the Sun was discovered in our galaxy

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Astronomers at Keio University in Japan noticedv something that looks like the biggest black hole in the Milky Way. The approximate mass of the object is 100,000 solar masses and it is located close to the center of the galaxy.

The research, published in Nature Astronomy, focused on a large cloud of molecular gas at a distance of nearly 200 light-years from the center of the Milky Way. The team managed to see the gas movement, which coincides with the presence of a massive compact object at its center, which they named CO-0.40-0.22 *.

The researchers also noted that the radiation from the gas cloud resembled those coming from the Milky Way nucleus, where the supermassive black hole of our galaxy is located, but this radiation is 500 times weaker. There is also a large difference in magnitude, because the supermassive Milky Way hole, called Sagittarius A *, is a mass of over 4 million solar masses.

“This is the first notation of a medium-sized a black hole candidate in our Milky Way,” said the lead author, Dr. Tomoharu Oka, for IFLScience. “This supports the fusion scenario of the creation and evolution of supermassive black holes in the galactic centers.”

The team already suspected that the cloud contained a medium-mass black hole, but this is the first detection of a point source on radio waves. New observations were made thanks to the ALMA (Atacama Large Millimeter / Submillimeter Array) whose sensitive antennas were ideal for receiving extremely cold rays from interstellar carbon monoxide clouds. The team compared observations with mathematical simulations of the gas cloud, and they coincided with the idea of black hole with an average mass in its interior. The team is convinced that CO-0.40-0.22 * is one of the most reputed black hole candidates with an average mass so far.

The discovery of potential new black holes is always exciting, but this is of particular importance, as it contributes to significant details of how the supermassive black holes originated.Black holes are created by supernova explosions, but their size is still related to that of the star from which they were created. How then can there be black holes that are millions, if not billions of times heavier than the Sun?

One main theory suggests that in the early Universe black holes were created more often because the stars were much larger and burnt their fuel faster. These black holes would be merged, thereby reaching hundreds of solar masses. Then they would begin to merge with other such black holes, finally becoming supermassive black holes.

The team continues to observe the source and they hope that with only a decade of observation they will be able to describe how it moves through the galaxy and whether it will merge with Sagittarius

A *.

2 Comments

  1. Prabhakar Venkataramaiah

    January 12, 2019 at 1:32 pm

    Very interesting. Thanks

  2. Keith Lassu

    February 4, 2020 at 2:52 am

    Love this stuff very interesting THANKS keep them coming.

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