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Astronomers puzzled by little red galaxies that seem impossibly dense

newscientist.com

61–66 of 66 posts

Re: Astronomers puzzled by little red galaxies that seem impossibly dense

#63
post #46

Is this what a group of type III civilizations look like on the Kardashev scale? Back when the universe was hot and dense and it was still fun?

This is what happens once you start down the road of making Paperclips…

"It looks like you're telling a transhumanist parable. Would you like help?"

https://www.decisionproblem.com/paperclips/index2.html#-game

Re: Astronomers puzzled by little red galaxies that seem impossibly dense

#64
post #59

Earlier quoted context omitted.

Assuming that all their light is coming from stars, they have far too much stellar mass (with stellar masses similar to the Milky Way) to be the progenitors of today's globular clusters.

In globular clusters stars tend to have similar age in terms of main sequence progression. If most of the stars approach their brightest phase, the cluster will be extremely bright relative to its mass.

Such a mass-to-light ratio is accounted for when computing a stellar mass.

Re: Astronomers puzzled by little red galaxies that seem impossibly dense

#65
post #59

Earlier quoted context omitted.

In globular clusters stars tend to have similar age in terms of main sequence progression. If most of the stars approach their brightest phase, the cluster will be extremely bright relative to its mass.

Such a mass-to-light ratio is accounted for when computing a stellar mass.

I've read the paper, those objects have all properties of AGNs, but since having AGNs so early doesn't fit current mainstream, authors try very hard to come up with a different explanation.

Re: Astronomers puzzled by little red galaxies that seem impossibly dense

#66
post #24

“Unlock this article” Please stop linking to paywalls ffs.

And then people complain about clickbait. If you want good science journalism then you ought to be willing to pay for it. Otherwise it will be funded by adverts, and that means maximising clicks, and that means clickbait headlines.
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