Paul, sorry, previous post was written without my usual three or more edits in attempts to make things better understandable, or just sound sane. Notice though the last post was finished at 9:05am, I was to meet somebody at 9:00am. Returning, I found an article written a year before I read about it, probably took that much time to make the info a part of a book, and being kinda new, was not discussed a whole lot, also probably because of this mentioned in the article in 2006.
Quote:The Cambridge University team expects to submit the first of its results to a leading astrophysics journal in the next few weeks.
...
"The distribution of dark matter bears no relationship to anything you will have read in the literature up to now," explained Professor Gilmore.
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The points I pick up from this article matches in many ways what was what I had later read. Some of them being:
Quote:But now an Institute of Astronomy, Cambridge, team has at last been able to place limits on how it [dark matter] is packed in space and measure its "temperature".
"It's the first clue of what this stuff might be," said Professor Gerry Gilmore. "For the first time ever, we're actually dealing with its physics," he told the BBC News website.
Mentioned in an earlier post with halos and temperature.
Quote:Science understands a great deal about what it terms baryonic matter - the "normal" matter which makes up the stars, planets and people - but it has struggled to comprehend the main material from which the cosmos is constructed.
A general statement, of course saying dark matter is a mystery.
Quote:Astronomers cannot detect dark matter directly because it emits no light or radiation.
This, too.
Quote:Its presence, though, can be inferred from the way galaxies rotate: their stars move so fast they would fly apart if they were not being held together by the gravitational attraction of some unseen material.
Mentioned earlier, recounted from its history since Zwicky in 1933.
Quote:The Cambridge efforts have produced an additional, independent result: the detailed study of the dwarf galaxies has allowed the scientists to weigh our own galaxy more precisely than ever before.
"It turns out the Milky Way is more massive than we thought," said Professor Gilmore.
"It now looks as though the Milky Way is the biggest galaxy in the local Universe, bigger even than Andromeda. It was thought until just a few months ago that it was the other way around."
This is what I mean by inferred and visible being deceiving, because of the turn-around on which galaxy is bigger since, but notice again, this study was on dwarf galaxies perhaps not suitable in a search for dark matter, because as it mentions:
Quote:"It looks like you cannot ever pack it [dark matter] smaller than about 300 parsecs - 1,000 light-years; this stuff will not let you. That tells you a speed actually - about 9km/s - at which the dark matter particles are moving because they are moving too fast to be compressed into a smaller scale.
"These are the first properties other than existence that we've been able determine."
This why it may be dwarf galaxies are unlikely candidates if searching for dark matter and not part of the hunt, they can be too small, or if larger than this, too sparse in amount as to be detectably relevant in its mass. This is why I kept the conversation on galaxies and clusters. Here also explains why:
Quote:"If this temperature for the dark matter is correct, then it has huge implications for direct searches for these mysterious particles (it seems [science] may be looking in the wrong place for them) and for how we thought the galaxies and clusters of galaxies evolve in the Universe.
"Having 'hotter' dark matter makes it harder to form the smallest galaxies, but does help to make the largest structures This result will generate a lot of new research."
Quote:The most likely candidate for dark matter material is the so-called weakly interacting massive particle, or Wimp.
This relates back to a further comment on Colin's original mention of a MN detection base where absolute zero is used. This also.
Quote:Experimental crystal detectors placed down the bottom of deep mines are hoping to record the passage through normal matter of these hard to grasp dark matter particles.
Could be the CERN and Lawrence Livermore projects:
Quote:Researchers would hope also that future experiments in particle accelerators will give them greater insight into the physics of dark matter.
Of course the article explains all this, but just wanted to show how this early article has related closely to information I had learned of afterward and as noticed doesn't make mention of infrared/ultraviolet for some reason. So what you last posted was strange to me but from what mention I've read, a dwarf galaxy was in common. That was all I could comment about it.
of course edited again.
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