Science Gravitational waves gave a new black hole a high-speed ‘kick’

tom_mai78101

The Helper Connoisseur / Ex-MineCraft Host
Staff member
This black hole really knows how to kick back.

Scientists recently observed two black holes that united into one, and in the process got a “kick” that flung the newly formed black hole away at high speed. That black hole zoomed off at about 5 million kilometers per hour, give or take a few million, researchers report in a paper in press in Physical Review Letters. That’s blazingly quick: The speed of light is just 200 times as fast.

Ripples in spacetime, called gravitational waves, launched the black hole on its breakneck exit. As any two paired-up black holes spiral inward and coalesce, they emit these ripples, which stretch and squeeze space. If those gravitational waves are shot off into the cosmos in one direction preferentially, the black hole will recoil in response.

It’s akin to a gun kicking back after shooting a bullet, says astrophysicist Vijay Varma of the Max Planck Institute for Gravitational Physics in Potsdam, Germany.

Gravitational wave observatories LIGO and Virgo, located in the United States and Italy, detected the black holes’ spacetime ripples when they reached Earth on January 29, 2020. Those waves revealed details of how the black holes merged, hinting that a large kick was probable. As the black holes orbited one another, the plane in which they orbited rotated, or precessed, similar to how a top wobbles as it spins. Precessing black holes are expected to get bigger kicks when they merge.

 

The Helper

Necromancy Power over 9000
Staff member
I think there is still a lot we do not know about Gravity. I read that it should be stronger and that is the whole dark matter thing... love this stuff.
 
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    I dunno if I ever mentioned it here, but my bot actually helped someone discover a new way to clip through walls.
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    I added those forums to the filter for that widget.
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    Oh nice. They're back. Thanks.
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    Awesome Ghan thanks! I was purposely not moving the first 15 news articles in Headline news to the different subforums but I guess I don't have to do that now?
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    If you move a thread please leave a permanent redirect. You can delete any redirects after 6 months. The redirects are left to help Search Engines find the moved content.
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    What if you move the permanent redirect, not the thread?
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    I think that works but I have not messed with it. You can delete redirects though if you have to that will not delete the original thread
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    if a redirect ends up in the same forum as the post it goes to though I think the redirect drops or fails or something but they are not bugged out and when you are working on an indirect the original post is safe.
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