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Registered Member #1526
Joined: Mon Jun 09 2008, 12:56AM
Location: UK
Posts: 216
Yeah I guess it is a kind of semantic argument but the rotation curves are `evidence` of either dark matter or new physics, pretty much like this new announcement is `evidence` of...dark matter or new physics.
So it`s not really bringing us any closer to an answer - it`s not like they`ve isolated a WIMP in the lab or something, know what I mean?
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
Fraggle wrote ...
Yeah I guess it is a kind of semantic argument but the rotation curves are `evidence` of either dark matter or new physics, pretty much like this new announcement is `evidence` of...dark matter or new physics.
So it`s not really bringing us any closer to an answer - it`s not like they`ve isolated a WIMP in the lab or something, know what I mean?
Yep.
There are theories that don't rely on 'new physics'. While 'Dark Matter' appears to a lot of people to have passed 'Occam's Razor ' (Oakham's Razor), some are suggesting that, for instance, electrical forces, which are a lot stronger than gravitational forces, may account, at least for part of, for what Dark Matter was invented to explain.
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
Fraggle wrote ...
Well, whatever it is, I feel lucky to be alive at this point in history - something big is definitely on the horizon...
It is quite an exciting point in history, with the Higgs boson, and everything else.
While the 'Dark Matter' theory may turn out to be correct, I'm certainly not one of those people who takes it for granted. The amount of Dark matter required was scaled down again only a few weeks ago, after more was learned (from some new satellite, I think I posted a link at the time) about the Big Bang.
We have also only just started measuring the amounts and effects of electricity in space (plasma, etc), and it's effects following the big bang when everything was still plasma, so I don't think we've yet exhausted the existing physics, or reached the point where we need to invent 'new physics' like Dark Matter, but there's no harm in speculation.....
It just surprises me how many 'educated' people seem to take Dark Matter for granted.
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
Uspring wrote ...
I'd like to know, how a large flux of high energy electrons and positrons becomes evidence of dark matter.
Well, they seemed to be implying that the positrons 'could' be coming from Dark Matter, even though there are 'conventional' explanations for their origin.
Registered Member #1526
Joined: Mon Jun 09 2008, 12:56AM
Location: UK
Posts: 216
I do agree with you quite a lot actually, I was always a bit disappointed with the dark matter `evidence`. It COULD mean dark matter, some correction to gravity beyond the quadratic maybe or, the real killer for me is the ambiguity in both spiral incliniation and especially doppler broadening of blobs.
It`s not truly scientific to me because it is, of course, un-testable really.
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First evidence of 'Dark Matter'?
