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Universe's first galaxies discovered, and they contradict theoryof reionization interpreted from WMAP
SPACE.com -- Some of the Universe's First Galaxies Discovered
"Ouchi and his team compared their observations with those from other studies looked at the rates of star formation, which can be gleaned from data on the density and brightness of galaxies, and found that they were dramatically lower from 800 millions years to about one billion years after the Big Bang, than thereafter. Accordingly, they calculated that the rate of ionization would be very slow during this early time, because of this low star-formation rate. "We were really surprised that the rate of ionization seems so low, which would constitute a contradiction with the claim of NASA's WMAP satellite. It concluded that reionization started no later than 600 million years after the Big Bang," Ouchi said. " http://www.space.com/scienceastronom...-universe.html |
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