The warm/hot gas trapped in between the galaxies, with temperatures as hot as a hundred million degrees, contain most of the thermal energy and baryons of the universe. I try to understand various properties of this intergalactic gas, specifically through its impact on the cosmic microwave background (Sunyaev-Zel’dovich effect), as well as its X-ray emission. For more details see:
Niayesh Afshordi 
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