Impact of stochastic primordial magnetic fields on the scalar contribution to cosmic microwave background anisotropies

Journal Article · Tue Jul 15 00:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.78.023510· OSTI ID:21250330

Finelli, Fabio; Paci, Francesco; Paoletti, Daniela ^[1]

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1. INAF/IASF-BO, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna via Gobetti 101, I-40129 Bologna (Italy)

We study the impact of a stochastic background of primordial magnetic fields on the scalar contribution of cosmic microwave background (CMB) anisotropies and on the matter power spectrum. We give the correct initial conditions for cosmological perturbations and the exact expressions for the energy density and Lorentz force associated to the stochastic background of primordial magnetic fields, given a power-law for their spectra cut at a damping scale. The dependence of the CMB temperature and polarization spectra on the relevant parameters of the primordial magnetic fields is illustrated.

• OSTI ID: 21250330
• Journal Information: Physical Review. D, Particles Fields, Vol. 78, Issue 2; Other Information: DOI: 10.1103/PhysRevD.78.023510; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
ANISOTROPY
DAMPING
DISTURBANCES
ENERGY DENSITY
LORENTZ FORCE
MAGNETIC FIELDS
MATTER
PERTURBATION THEORY
POLARIZATION
RELICT RADIATION
SPECTRA
STOCHASTIC PROCESSES