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| Tags: cmbr, neutron, stars |
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N:dlzc D:aol T:com (dlzc) wrote: Dear Bilge: "Bilge" wrote in message ... N:dlzc D:aol T:com \(dlzc\): The CMBR appears to have a perfect blackbody emission curve, at least from what is left after passing through intergalactic and interstellar "stuff". Normal matter does not produce the kind of emission curve that the CMBR produces (apparently). Well, it does when the spectrum is produced by free electrons (or charges, in general) rather than by excitations of bound charges, which produce a discrete spectrum. Compton scattering from free charges with a range of velocities in accordance wiht temperature. That sounds right, epecially in light of "neutron stars aren't all neutrons". Certain types of neutron stars also appear to have perfect blackbody emission curves. I'm not sure how in-general-neutral particles can emit thermal photons, but that is another lesson. Recall that while neutrons are neutral, overall, they have magnetic dipole moments and are bound states of charged quarks. However, there is also more to a neutron star than just neutrons. Atmospheres made of iron! Go figure. Black holes are expected to "start with" very dense cores, such as neutron stars. What is the possibility that the CMBR is not "hydrogen gas at about 3000 K" but rather the emissions of the "matter structure" that triggered this Universe? Anything is possible if one can concoct a theory around it which doesn't contradict observations. wrong anybody can do easy theories which dosnt contradict observations the trick is in making good theorirs contradicting erratical observations Unfortunately, that's very hard to do. There should be evidence from neutrinos that could say more about the universe prior to the period which produced the cosmic background radiation, but unfortunately, neutrinos are not as user freindly. Obtaining the equivalent neutrino spectum is not yet technologically feasible. Our understanding of the universe prior to the production of the background radiation comes mainly from tying the electroweak and strong interactions to the temperatures at which those forces should have appeared as distinct. "Concoct" indeed! But if the shoe fits... I guess I should at least wear them! Thanks. Thanks to all, actually. David A. Smith |
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