Cosmic Dawn by George Rhee

Author:George Rhee
Language: eng
Format: epub
Publisher: Springer New York, New York, NY

Many scientific findings resulted from these surveys. As well as mapping out the cosmic web as traced by galaxies, the nearby galaxy surveys helped put constraints on the dark energy density, the matter density and the baryon density in the universe. One can accurately measure the star formation rate in the local universe and use this to show that the star formation rate was higher a few billion years ago than it is now. One can also study the effect of environment on galaxy properties. The colors of galaxies and the rate at which they form stars depend on the environment in which a galaxy finds itself. The surveys discovered quasars at high redshifts and made it possible to study the intergalactic gas properties at early times.

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