Sunday, December 08, 2013

Flatlining: A GR Bleg

Our universe is pretty flat. The WMAP tells me so. Or something.

That means that the density of matter and energy is very close to the critical density. Presumably the density decreases with time, since ordinary and dark matter become diluted with time.

So the question is this: In a universe with a cosmological constant does the density diverge from the critical density with time?