Tuesday, December 21, 2021

Dark Beginnings

(Illustration from EarthSky)
One question I have zero expertise in answering:

Black holes and dark matter — are they one and the same? [bold added]
If most of the primordial black holes were “born” [after the Big Bang] at a size roughly 1.4 times the mass of Earth’s sun, they could potentially account for all dark matter, said Yale professor of astronomy and physics Priyamvada Natarajan, the paper’s theorist.

Natarajan and her colleagues say their new model shows that the first stars and galaxies would have formed around black holes in the early universe. Also, she said, primordial black holes would have had the ability to grow into supermassive black holes by feasting on gas and stars in their vicinity, or by merging with other black holes...

“Our study shows that without introducing new particles or new physics, we can solve mysteries of modern cosmology from the nature of dark matter itself to the origin of super-massive black holes,” [Miami physics professor Nico] Cappelluti said.

Primordial black holes also may resolve another cosmological puzzle: the excess of infra-red radiation, synced with X-ray radiation, that has been detected from distant, dim sources scattered around the universe. Natarajan and her colleagues said growing, primordial black holes would present “exactly” the same radiation signature.

Best of all, the existence of primordial black holes can be proven — or disproven — in the near future, courtesy of the James Webb Space Telescope and ESA’s Laser Interferometer Space Antenna (LISA) mission announced for the 2030s.
Major discoveries are occurring in every field of science at a rapid rate, thanks to the development of tools like the Webb Space Telescope. That's a good reason for us Boomers to stay sentient as long as possible, just to see what happens.

In the Book of Genesis readers rush past the beginning where everything is formless, void, and dark in order to get to the light and the creation of the world. It appears that the study of darkness would be very much worth our while.

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