How Non-thermal Processes in the Intracluster Medium Affect the Sunyaev-Zel'dovich Angular Power Spectrum

Details How Non-thermal Processes in the Intracluster Medium Affect the Sunyaev-Zel'dovich Angular Power Spectrum How Non-thermal Processes in the Intracluster Medium Affect the Sunyaev-Zel'dovich Angular Power Spectrum

Publishing date

Jan 2011

URL

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21710903b&link_type=abstract

Journals

American Astronomical Society, AAS Meeting #217, #109.03; Bulletin of the American Astronomical Society, Vol. 43, 2011

Science

Astronomy and Astrophysics

Field

Astronomy

Type

Scientific paper

Abstract

To compute a reliable thermal Sunyaev-Zel'dovich angular power spectrum, it is essential to properly model the intracluster gas from the cluster core out to twice the virial radius, where pressure support from kinetic energy is important. We explore how radiative cooling, supernova feedback, cosmic rays and a new model of the energetic feedback from AGN affect this intracluster gas using a large set of hydrodynamical TreePM-SPH simulations of the cosmic web in big periodic boxes. We find the power at high-l that ACT and SPT probe is sensitive to the feedback model, hence can constrain the theory of intracluster gas, in particular at the uncertain redshifts >0.8. The apparent tension between σ8 from primary CMB power and from analytic SZ spectra inferred using ACT and SPT data is lessened with our AGN feedback.

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