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Talk:Warm–hot intergalactic medium

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WHIM

Why is WHIM so hot?

I saw a reference that WHIM has a temperature of 100,000 to 10 million degrees. How does it stay so hot? (I'm guessing that radiative cooling require the particles to collide before they can slow down and emit the relative motion as photons?) Why was it so hot in the first place? Wnt (talk) 20:53, 17 May 2010 (UTC)

This paper discusses hydrodynamic simulations of the WHIM: . It indicates that the gas is heated and compressed by shocks from gravitationally collapsing regions. There is some mention of cooling, but I gather that the cooling of the WHIM is substantially complicated by feedback, and that a lot of open questions remain in this area. --Amble (talk) 20:27, 21 May 2010 (UTC)
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