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The Mystery of the Little Red Dot Galaxies

Started by Dave Mitsky , May 20 2025 01:12 AM

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4 replies to this topic

#1 Dave Mitsky

ISS

topic starter

Posts: 123,836
Joined: 08 Apr 2002
Loc: PA, USA, North America, Planet Earth

Posted 20 May 2025 - 01:12 AM

When the JWST found Little Red Dot galaxies, astronomers were puzzled. They appeared to be brighter, and more massive, than galaxies should be in the very early Universe. New research is deepening this mystery.

https://phys.org/new...y-galaxies.html

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#2 deSitter

Still in Old School

Posts: 22,273
Joined: 09 Dec 2004

Posted 20 May 2025 - 02:40 AM

An alternative that will NOT be considered, is that these objects are very dim and not at cosmic distance, and are not hosting an SMBH and not emitting X-rays. That is, they are galaxy seeds showing intrinsic redshift.

I think we are seeing a repeat of the "Michael Disney experience" with Hubble. He was on the team designing the instruments. He was worried about the integrated light from low-surface brightness galaxies that were sure to be seen. The theorists explained that such galaxies could not possibly exist.

-drl