This Happened when the Black Holes of the Milky Way and Andromeda Collide

Suara.com – For astronomer have long known that Andromeda is on track to collide with the galaxy Milky Way.

But, not much is known about what will happen to black hole giants at the core of every galaxy.

Now, the simulations in the new study are published in Astronomy & Astrophysics on February 22, revealed the predictions that will happen.

The two galaxies will merge into one giant elliptical galaxy called Milkomeda in about 10 billion years.

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The central black holes will start orbiting each other and eventually collide less than 17 million years later.

Just before the black holes collide with each other, the two of them will emit gravitational waves with the power of 10 quintillion Suns.

Any star system within 3.25 million light years from Earth that has a gravitational wave sensing capability will be able to detect the collision.

Recent data shows Andromeda is approaching the Milky Way at a speed of about 116 kilometers per second.

Scientists at Sapienza University of Rome used computer simulations, which include the gravitational pull of two spiral galaxies against each other as well as the possible presence of gas to explain how the galaxies collide.

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Previous simulations have shown that Andromeda and the Milky Way are thought to collide in about 4 billion to 5 billion years.

But the new study predicts the two galaxies will collide with each other about 4.3 billion years from now and fully merge about 6 billion years later.

“The estimate of this new study for the Milkomeda merger date is slightly longer than that found by other research teams,” said Roeland van der Marel, an astronomer at the Space Telescope Science Institute. Science News, Tuesday (23/3/2021).

However, these differences in estimates could be partly due to uncertainty in Andromeda’s velocity measurements.

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