0 Members and 1 Guest are viewing this topic.
Or are they wrong.Any ideas?
"The hot gas in this collision was slowed by a drag force, similar to air resistance. In contrast, the dark matter was not slowed by the impact, because it does not interact directly with itself or the gas except through gravity.
Are you 'creating' two photons in one in that idea?
Ok, I see what you mean.I'm so used to thinking of it as a 'photonic' idea.thanks.
To be honest:)I was hoping that you people had ideas?It seems very strange to me.
Renormalization was first developed in quantum electrodynamics (QED) to make sense of infinite integrals in perturbation theory. Initially viewed as a suspect, provisional procedure by some of its originators, renormalization eventually was embraced as an important and self-consistent tool in several fields of physics and mathematics.
Stable, quantized gravitational bound states of primordial black holes called Holeums could have been produced in the early universe and could be a component of the Super Heavy Dark Matter (SHDM) present in galactic halos. We show that Holeums of masses of the order of 10**13 to 10**14 GeV and above are stable enough to survive in the present-day universe. We identify such Holeums as promising candidates for the SHDM "X-particle" and show that the decay of such Holeums by pressure ionization can give rise to cosmic rays of all observed energies, including Ultra High Energy Cosmic Rays (UHECR). The absence of the GZK cut-off is explained by the galactic halo origin of the UHECR. We predict that the cosmic rays are a manifestation of the end-stage Hawking radiation burst of the primordial black holes (PBH) liberated by the ionization of Holeums. Antimatter detected in cosmic rays could be a signature of their Holeum origin.
The universe is expanding and taking matter with it & that's why galaxies are moving away from each other (in general).
I think the evidence for the expansion of space is fairly conclusive. The only doubt is about what is causing it.
(An analogy would be the way pressure under water prevents you opening a car door)
Quote from: DoctorBeaver on 29/01/2009 11:55:37(An analogy would be the way pressure under water prevents you opening a car door)Air prevents you from opening the door.
That's why they conclude existence of dark matter.
Eh? I thought it was as a result of trying to establish why galaxies don't lose their stars.
QuoteEh? I thought it was as a result of trying to establish why galaxies don't lose their stars.You can say it that way, but it seems kind of odd; the stars had to get where they are by the force of gravity. We used to simply say that some galaxies spin too fast. But it is true that according to Newton, stars in those too-fast galaxies should fly off into space.
Exactly. So something is either pulling on them to hold them in place (gravity in the form of dark matter), or there is a pressure pushing them from outside the galaxy that is holding them there.
What I'm thinking is a bit different from that
Quote from: DoctorBeaver on 29/01/2009 15:31:22What I'm thinking is a bit different from thatInteresting; is it something you can describe?
I'll try to write it out first then post it here if I succeed
The biggest reason why we suspect the existence of dark matter is the fact that galaxies form clusters and super clusters. the distances are too big for them to be held by ordinary gravity.