CAA-Seminar 06：Searching for Missing Baryons with WMAP and PLANCK (Fernando Atrio Barandela, May.24, 2013)

Title: Searching for Missing Baryons with WMAP and PLANCK

Speaker: Fernando Atrio Barandela, Universidad de Salamanca

Time and place: 14:00--15:00,May.24（Friday）, 2013, CAA Lecture Hall,jianchuan Road 955

Abstract:

About half the baryons in the local Universe could be in the form of a Warm Hot Intergalactic Medium (WHIM). If a large fraction of the gas is ionized,it could produce significant temperature anisotropies in the Cosmic Microwave Background (CMB), generated by the thermal and also the kinematic Sunyaev-Zeldovich effect. We have developed a theoretical framework to describe the mildly non-linear regime of the WHIM that allows us to compute its contribution to CMB anisotropies measured by the WMAP and PLANCK satellites. We also discuss prospective ways of detecting this contribution by cross correlating templates constructed from galaxy catalogs with CMB data.