Kahniashvili, Tina და Ratra, Bharat (2007) CMB anisotropies due to cosmological magnetosonic waves. Physical review D, 75.
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რეზიუმე
We study scalar mode perturbations (magnetosonic waves) induced by a helical stochastic cosmological magnetic field and derive analytically the corresponding cosmic microwave background (CMB) temperature and polarization anisotropy angular power spectra. We show that the presence of a stochastic magnetic field, or an homogeneous magnetic field, influences the acoustic oscillation pattern of the CMB anisotropy power spectrum, effectively acting as a reduction of the baryon fraction. We find that the scalar magnetic energy density perturbation contribution to the CMB temperature anisotropy is small compared to the contribution to the CMB E-polarization anisotropy.
| ობიექტის ტიპი: | სტატია |
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| თემატიკა: | Q Science > QB Astronomy Q Science > QC Physics |
| განმათავსებელი მომხმარებელი: | Prof. Tina Kahniashvili |
| განთავსების თარიღი: | 29 იანვარი 2014 19:48 |
| ბოლო ცვლილება: | 27 მარტი 2015 07:03 |
| URI: | http://eprints.iliauni.edu.ge/id/eprint/741 |
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