Massive neutrinos and magnetic fields in the early universe

Journal Article · Mon Feb 15 04:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.043517· OSTI ID:21409271

Shaw, J Richard; Lewis, Antony ^[1]

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1. Kavli Institute for Cosmology, Madingley Road, Cambridge, CB3 0HA (United Kingdom)

Primordial magnetic fields and massive neutrinos can leave an interesting signal in the CMB temperature and polarization. We perform a systematic analysis of general perturbations in the radiation-dominated universe, accounting for any primordial magnetic field and including leading-order effects of the neutrino mass. We show that massive neutrinos qualitatively change the large-scale perturbations sourced by magnetic fields, but that the effect is much smaller than previously claimed. We calculate the CMB power spectra sourced by inhomogeneous primordial magnetic fields, from before and after neutrino decoupling, including scalar, vector and tensor modes, and consistently modeling the correlation between the density and anisotropic stress sources. In an appendix we present general series solutions for the possible regular primordial perturbations.

• OSTI ID: 21409271
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 4 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
79 ASTRONOMY AND ASTROPHYSICS
ACCOUNTING
ANISOTROPY
CORRELATIONS
DECOUPLING
DENSITY
DISTURBANCES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FERMIONS
LEPTONS
MAGNETIC FIELDS
MASS
MASSLESS PARTICLES
MATHEMATICAL SOLUTIONS
MICROWAVE RADIATION
NEUTRINOS
PERTURBATION THEORY
PHYSICAL PROPERTIES
POLARIZATION
RADIATIONS
RELICT RADIATION
SIMULATION
SPECTRA
STRESSES
UNIVERSE