Power spectrum of the Sunyaev-Zel'dovich effect - INSPIRE

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Power spectrum of the Sunyaev-Zel'dovich effect

2000

11 pages

Published in:

Phys.Rev.D 61 (2000) 123001

e-Print:

astro-ph/9912180 [astro-ph]

DOI:

10.1103/PhysRevD.61.123001

View in:

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Abstract: (arXiv)

(Abridged) The hot gas in the IGM produces anisotropies in the Cosmic Microwave Background (CMB) through the thermal Sunyaev-Zel'dovich (SZ) effect. The SZ effect is a powerful probe of large-scale structure in the universe and must be carefully subtracted from measurements of the primary CMB anisotropies. We use moving-mesh hydrodynamical simulations to study the 3-dimensional statistics of the gas, and compute the mean comptonization parameter and the angular power spectrum of the SZ fluctuations, for different cosmologies. We compare these results with predictions using the Press-Schechter formalism. We find that the two methods agree approximately, but differ in details. We discuss this discrepancy, and show that resolution limits the reliability of our results to the 200

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