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The Sunyaev–Zel'dovich effect and Faraday rotation contributions of galaxy groups to the CMB angular power spectrum |
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| Authors: | Hiroyuki Tashiro Joseph Silk Mathieu Langer Naoshi Sugiyama |
| Institution: | Institut d'Astrophysique Spatiale (IAS), Bâtiment 121, UniversitéParis-Sud 11 and CNRS (UMR 8617), F-91405, Orsay, France;Astrophysics, Denys Wilkinson Building, The University of Oxford, Keble Road, Oxford OX1 3HR;Department of Physics and Astrophysics, Nagoya University, Chikusa-ku, Nagoya, 464-8602, Japan;Institute for Physics and Mathematics of the Universe, University of Tokyo, Kashiwa-no-Ha, Kashiwa, Chiba, 277-8582, Japan |
| Abstract: | The Sunyaev–Zel'dovich (SZ) effect and the Faraday rotation from haloes are examined over a wide mass range, including gas condensation and magnetic field evolution. Contributions to the cosmic microwave background (CMB) angular power spectrum are evaluated for galaxy clusters, galaxy groups and galaxies. Smaller mass haloes are found to play a more important role than massive haloes for the B -mode polarization associated with the SZ CMB anisotropies. The B modes from the Faraday rotation dominate the secondary B modes caused by gravitational lensing at ℓ > 3000 . Measurement of B -mode polarization in combination with the SZ power spectrum can potentially provide important constraints on intracluster magnetic field and gas evolution at early epochs. |
| Keywords: | magnetic fields cosmology: theory large-scale structure of the Universe |