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Title: Effects of mass varying neutrinos on cosmological parameters as determined from the cosmic microwave background

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Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 90; Journal Issue: 4; Journal ID: ISSN 1550-7998
American Physical Society
Country of Publication:
United States

Citation Formats

Ghalsasi, Akshay, and Nelson, Ann E. Effects of mass varying neutrinos on cosmological parameters as determined from the cosmic microwave background. United States: N. p., 2014. Web. doi:10.1103/PhysRevD.90.045002.
Ghalsasi, Akshay, & Nelson, Ann E. Effects of mass varying neutrinos on cosmological parameters as determined from the cosmic microwave background. United States. doi:10.1103/PhysRevD.90.045002.
Ghalsasi, Akshay, and Nelson, Ann E. Fri . "Effects of mass varying neutrinos on cosmological parameters as determined from the cosmic microwave background". United States. doi:10.1103/PhysRevD.90.045002.
title = {Effects of mass varying neutrinos on cosmological parameters as determined from the cosmic microwave background},
author = {Ghalsasi, Akshay and Nelson, Ann E.},
abstractNote = {},
doi = {10.1103/PhysRevD.90.045002},
journal = {Physical Review D},
number = 4,
volume = 90,
place = {United States},
year = {Fri Aug 01 00:00:00 EDT 2014},
month = {Fri Aug 01 00:00:00 EDT 2014}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevD.90.045002

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Cited by: 5works
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  • The cosmic microwave background anisotropy is sensitive to the slope and amplitude of primordial energy density and gravitational wave fluctuations, the baryon density, the Hubble constant, the cosmological constant, the ionization history, etc. In this Letter, we examine the degree to which these factors can be separately resolved from combined small- and large-angular-scale anisotropy observations. We isolate directions of degeneracy in this cosmic parameter space, but note that other cosmic observations can break the degeneracy.
  • Cosmological magnetic fields induce temperature and polarization fluctuations in the cosmic microwave background (CMB) radiation. A cosmological magnetic field with current amplitude of order 10{sup -9} G is detectable via observations of CMB anisotropies. This magnetic field (with or without helicity) generates vector perturbations through vortical motions of the primordial plasma. This paper shows that magnetic field helicity induces parity-odd cross correlations between CMB temperature and B-polarization fluctuations and between E- and B-polarization fluctuations, correlations which are zero for fields with no helicity (or for any parity-invariant source). Helical fields also contribute to parity-even temperature and polarization anisotropies, canceling partmore » of the contribution from the symmetric component of the magnetic field. We give analytic approximations for all CMB temperature and polarization anisotropy vector power spectra due to helical magnetic fields. These power spectra offer a method for detecting cosmological helical magnetic fields, particularly when combined with Faraday rotation measurements which are insensitive to helicity.« less
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