Re: Galaxy formation theories challenged

N:dlzc D:aol T:com (dlzc) wrote:
"Yousuf Khan" <bbbl67@xxxxxxxxx> wrote in message
How's that possible? The universe should be mainly
Hydrogen and Helium.

It isn't entirely oxygen, but a good deal of it is.
http://www.physorg.com/news130516845.html

I understand that they detected some Oxygen ions in
the sprectra, but primarily Oxygen? I doubt it.

Even 25% would give the wrong "signature".

Well, that link didn't give any percentages of how much oxygen there is out there in the intergalactic medium. The oxygen is mainly ionized plasma, so it's probably skewed by the fact that plasma is probably more photo-active than non-ionized atoms.

They did mention they think most of it came from supernovas from nearby galaxies. Though there is a lot of matter that can come out of supernovas, is it enough to fill the intergalactic medium?

We *found* cold hydrogen galaxies.
http://www.spacedaily.com/news/darkmatter-05h.html
... (wasn't Dark Matter, just cold hydrogen).

I know, but they are still claiming that most of that cold hydrogen has to be kept together by Dark Matter, of course.

It's kind of interesting that there are galaxies of hydrogen gas that haven't formed completely into stars, even now. Wonder if these will be the last galaxies in the universe to ignite, just as the universe smooths itself out to a cold flat state? The last gasp of matter.

If as you say, most of the intergalactic gas is Oxygen,
then where are the dark galaxies or free-roving black
holes going to find their hydrogen?

Hawking Radiation, or those fascinating polar jets...


So through Hawking Radiation, you think the black hole is going to produce enough free protons to create a whole star, let alone a galaxy's worth of stars?

Yousuf Khan
.

Relevant Pages

  • New analysis puts dark matter back into elliptical galaxies (Forwarded)
    ... This theory faced a challenge in 2003, when a team of astronomers reported a surprising absence of dark matter in elliptical galaxies. ... But a new analysis published in the September 29 issue of the journal Nature provides an explanation for the earlier observations that fits comfortably with the standard theory and puts the dark matter back into elliptical galaxies. ... "A dearth of dark matter in elliptical galaxies is especially puzzling in the context of the standard theory of galaxy formation, which assumes that ellipticals originate from mergers of disk galaxies," added Avishai Dekel, professor of physics at the Hebrew University of Jerusalem and first author of the Nature paper. ... Whereas spiral galaxies are dominated by flattened, rotating disks of stars and gas, elliptical galaxies are round, smooth collections of stars. ...
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  • Re: Did you know that Supernova winds can push Dark Matter around?
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  • New analysis puts dark matter back into elliptical galaxies (Forwarded)
    ... New analysis puts dark matter back into elliptical galaxies ... disks of stars and gas, elliptical galaxies are round, smooth collections ...
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