CMB anisotropies due to cosmological magnetosonic waves

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dc.creatorKahniashvili, Tina
dc.creatorRatra, Bharat
dc.date2006-11-07
dc.date2006-12-15
dc.date.accessioned2026-07-07T10:24:12Z
dc.date.available2026-07-07T10:24:12Z
dc.descriptionWe 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.
dc.description17 pages, references added, version accepted for publication in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/astro-ph/0611247
dc.identifierhttp://arxiv.org/abs/astro-ph/0611247
dc.identifierPhys.Rev.D75:023002,2007
dc.identifierdoi:10.1103/PhysRevD.75.023002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/176104
dc.subjectAstrophysics
dc.titleCMB anisotropies due to cosmological magnetosonic waves
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