Isabel Suarez (AIP)

Searching for the missing baryons in the Warm-Hot Intergalagtic Medium
When Sep 20, 2013 from 10:30 AM to 12:00 PM
What
  • Colloquium
Where SH, Lecture hall
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The so called Warm-Hot Intergalactic Medium (WHIM) is considered as one of the biggest reservoirs of baryons in the universe. These structures consist of shock-heated gas with temperatures in the range 10^5-10^7 K and overdensities δ < 100. This combination of high temperatures and small densities make the WHIM very difficult to detect. However, being highly ionized the hot electron gas within the WHIM, which interact with the CMB photons, could leave an imprint in the CMB power spectrum of anisotropies by means of the Sunyaev-Zeldovich effect (SZ). Modelling the WHIM, one can give an estimate of the amplitude of this anisotropies. In this talk I will describe how to model the WHIM in order to calculate the SZ signal induced by the warm-hot gas. Then, I will discuss the possibility of finding this signal in WMAP/Planck data together with a parameter study using WMAP/SPT data.