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CMBR question
From reviewing the "space-time" diagrams at:
http://www.astro.ucla.edu/~wright/cosmo_02.htm And noting that the number of identified objects at distance roughly corresponds to the length of any "constant distance" gradient... Is the CMBR really some highly magnified object, stuck in the "lens" represented by this curved spacetime? In other words, could the CMBR really be the surface of a star, or (more likely) a nebula? I know it is felt that it is not very thick, because of its "pure" spectrum... David A. Smith |
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CMBR question
Dear Steve Willner:
"Steve Willner" wrote in message ... In article naFZa.9246$2g.6725@fed1read05, \(formerly\)" dlzc1.cox@net writes: Is the CMBR really some highly magnified object, stuck in the "lens" represented by this curved spacetime? In other words, could the CMBR really be the surface of a star, or (more likely) a nebula? I think you will have a hard time finding a lens that images over 4 pi steradians, especially to the smoothness of the microwave background. Also, lenses preserve surface brightness. What object has a surface brightness temperature of 2.7 K and the energy density of the microwave background? It has the spectrum of a *very* hot gas, which is why we know how far back it is. I think it was something like 20,000K, unless I have my facts screwed up again... Perhaps a fisheye lens will correct a part of it? I figure it will still be a blur... David A. Smith |
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