Journal
NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA B-BASIC TOPICS IN PHYSICS
Volume 121, Issue 5, Pages 487-500Publisher
SOC ITALIANA FISICA
DOI: 10.1393/ncb/i2005-10223-0
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We improve the calculation of Nozawa, Itch, and Kohyama (1998) to provide a formula for relativistic corrections to the thermal and kinematical Sunyaev-Zeldovich effects that is accurate to fourth order in theta(e) equivalent to k(B)T(e)/m(e)c(2), T-e and m(e) being the electron temperature and electron mass, respectively. We also carry out a direct numerical integration of the Boltzmann collision term and confirm the excellent accuracy of the analytic formula. This formula will be useful for the analysis of the observational data of the forthcoming experiments of the kinematical Sunyaev-Zeldovich effect for clusters of galaxies.
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