Assume a flat Friedmann-Robertson-Walker universe, and that the density parameters for matter radiation, and the cosmological constant are given today by 2,0 = 0.4, rad,0 = 0.01, and 4,0 = 0.59, respectively. a) Calculate the redshifts for matter-radiation and matter-dark energy equality. b) State what effect the lower ratio of 1,0/m,0, compared to the standard A-CDM cosmology has on structure formation.
Assume a flat Friedmann-Robertson-Walker universe, and that the density parameters for matter radiation, and the cosmological constant are given today by 2,0 = 0.4, rad,0 = 0.01, and 4,0 = 0.59, respectively. a) Calculate the redshifts for matter-radiation and matter-dark energy equality. b) State what effect the lower ratio of 1,0/m,0, compared to the standard A-CDM cosmology has on structure formation.
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Transcribed Image Text:Assume a flat Friedmann-Robertson-Walker universe, and that the density parameters for matter,
radiation, and the cosmological constant are given today by m,0 = 0.4, rad,0 = 0.01, and 24,0
0.59, respectively.
a) Calculate the redshifts for matter-radiation and matter-dark energy equality.
=
b) State what effect the lower ratio of 2,0/2m,0, compared to the standard A-CDM cosmology,
has on structure formation.
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