<
https://theconversation.com/a-direct-wave-from-colliding-black-holes-reveals-signature-of-a-whirlpool-in-spacetime-286032>
"Black holes are some of the most mysterious objects in the universe, but they
aren’t always silent. When two black holes are close enough to each other, they
spiral towards one another, eventually crashing in an enormous explosion and
forming a single, larger black hole from the combination.
During this process they emit gravitational waves, ripples in the fabric of
space and time that reach us here on Earth. These travel to us and change the
distance between your nose and your ear, but by much, less than the a single
atom! We are able to detect them with huge, sophisticated gravitational wave
detectors – such as with the Laser Interferometer Gravitational Wave
Observatory (LIGO) in the United States.
The “loudest” black hole merger event on record was detected last year. Known
as GW250114, this cataclysmic collision has now revealed an exceptionally clear
view of the newly formed black hole, revealing subtle signatures tied to its
event horizon.
Using GW250114, my colleagues and I have decoded a previously hidden part of
the signal, the so-called direct wave, which reveals how rotating black holes
drag spacetime itself around them when they spin. Our research is published
today in
Nature."
Cheers,
*** Xanni ***
--
mailto:xanni@xanadu.net Andrew Pam
http://xanadu.com.au/ Chief Scientist, Xanadu
https://glasswings.com.au/ Partner, Glass Wings
https://sericyb.com.au/ Manager, Serious Cybernetics
