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Title: CONSTRAINTS ON SPATIAL VARIATIONS IN THE FINE-STRUCTURE CONSTANT FROM PLANCK

We use the cosmic microwave background (CMB) anisotropy data from Planck to constrain the spatial fluctuations of the fine-structure constant α at a redshift of 1100. We use a quadratic estimator to measure the four-point correlation function of the CMB temperature anisotropies and extract the angular power spectrum fine-structure constant spatial variations projected along the line of sight at the last scattering surface. At tens of degree angular scales and above, we constrain the fractional rms fluctuations of the fine-structure constant to be (δα/α){sub rms} < 3.4 × 10{sup –3} at the 68% confidence level. We find no evidence for a spatially varying α at a redshift of 10{sup 3}.
Authors:
; ; ;  [1]
  1. Department of Physics and Astronomy, University of California, Irvine, CA 92697 (United States)
Publication Date:
OSTI Identifier:
22364757
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 798; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANISOTROPY; BACKGROUND RADIATION; CORRELATION FUNCTIONS; FINE STRUCTURE; FLUCTUATIONS; INFLATIONARY UNIVERSE; LIMITING VALUES; RED SHIFT; RELICT RADIATION; SURFACES