Wednesday , October 27 2021

What connects several galaxies with black holes tells the future of the Milky Way


The team of astronomers was able to observe for the first time the last stages of the merger between several pairs of galaxies.

This is an event that has been theorized but so far it has not been verified directly.

The team led by Michael Koss, a scientist at Eureka Scientific Inc., investigated hundreds of nearby galaxies using images from the WM Keck Observatory in Hawaii and NASA & Hubble Space Telescope.

The research team captured pairs of supermassive black holes, each of which occupied the center of relevant galaxies, they are approaching each other before joining and unique and gigantic black hole. NASA reported in a statement.


One of the most violent events

At the center of most (if not all) galaxies are located supermassive black holes with a mass of billions more than the sun or Earth.

The supermassive black hole in the center of our galaxy, the Milky Way, is called Sagittarius A * (Sgr A *)) and has a weight of 4.3 million soles.

Galaxies were more common in the early stages of the universe. Therefore, these images provide a rare insight one of the most violent events in the universe.

They also announce which will probably happen when the Milky Way connects with the neighboring galaxy of Andromeda.

Both galaxies contain supermassive black holes in their center, which eventually they will fall and merge into a larger black hole.

Galactic fusion

The fusion of galaxies is a slow process that continues over a billion years.

Under the unrelenting force of gravity, two galaxies are slowly approaching each other until they finally join.

This analysis was confirmed by the Eureka Scientific Inc. team black holes of galaxies grow faster when they approach a collision.

"The fact that black holes grow faster as the merger progresses, tells us that these galaxy encounters are really important when it comes to understanding How? these objects They arrived be so terribly big"said colleague Laura Blecha from the University of Florida collaborating with the researcher in a statement by NASA.


The team focused on galaxies located on average 330 million light years from Earth, relatively close in space categories.

Many of these galaxies are similar to the galaxy of the Milky Way and Andromeda. In total, the team analyzed 96 galaxies observed with the Keck telescope and 385 galaxies from the Hubble & # 39; archive.

The Milky Way is now approaching the galaxy of Andromeda at an average speed of 300 kilometers per second, so at some point they will merge into one great galaxy.

But now you do not have to worry about it: experts predict that the merger will not take place inside a few billion years.

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