Open Question: Astronomy/density question: how much higher is the matter density in these CMB hot spots today?
8:46 Publicado por Flechado16
QUESTION:
- CMB hot spots have matter density that is about 10^-5 higher than the background average.
Let us consider the evolution of such a hot spot with the opposite assumption as above.
Assume the matter density in the hot spot is sufficient to resist the cosmological expansion and therefore remains constant, while the rest of the universe expands as
a = t^2/3
Compared to today's mean matter density in the universe (30% of the critical density),
how much higher is the matter density in these hot spots today?
- CMB hot spots have matter density that is about 10^-5 higher than the background average.
Let us consider the evolution of such a hot spot with the opposite assumption as above.
Assume the matter density in the hot spot is sufficient to resist the cosmological expansion and therefore remains constant, while the rest of the universe expands as
a = t^2/3
Compared to today's mean matter density in the universe (30% of the critical density),
how much higher is the matter density in these hot spots today?
it has something to with the density of background = t^-2, and i'm supposed to calculate the ratio based on the times
PLEAAAASEEE HELPPPPP
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