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Precision era of the kinetic Sunyaev-Zeldovich effect: simulations, analytical models and observations and the power to constrain reionization | | Pengjie Zhang
; Ue-Li Pen
; Hy Trac
; | | Date: |
29 Apr 2003 | | Journal: | Mon.Not.Roy.Astron.Soc. 347 (2004) 1224 | | Subject: | astro-ph | | Affiliation: | Fermilab), Ue-Li Pen (CITA), Hy Trac (Astronomy & Astrophysics department, University of Toronto | | Abstract: | The kinetic SZ effect, which is the dominant CMB source at arc-minute scales and $
u sim 217$ Ghz, probes the ionized gas peculiar momentum up to the epoch of reionization and is a sensitive measure of the reionization history. We ran high resolution self-similar and $Lambda$CDM hydro simulations and built an analytical model to study this effect. Our model reproduces the $Lambda$CDM simulation results to several percent accuracy, passes various tests against self-similar simulations, and shows a wider range of applicability than previous analytical models. Our model in its continuous version is free of simulation limitations such as finite simulation box and finite resolution and allows an accurate prediction of the kinetic SZ power spectrum $C_l$. For the WMAP cosmology, we find $l^2C_l/(2pi)simeq 0.91 imes 10^{-12} [(1+z_{
m reion})/10]^{0.34}(l/5000)^{0.23-0.015(z_{
m reion}-9)}$ for the reionization redshift $6 | | Source: | arXiv, astro-ph/0304534 | | Services: | Forum | Review | PDF | Favorites | |
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