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 or 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 angu...
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| Veröffentlicht in: | The Astrophysical journal 2015-01, Vol.798 (1), p.1-5, Article 18 |
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| container_title | The Astrophysical journal |
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| creator | O'Bryan, Jon Smidt, Joseph De Bernardis, Francesco Cooray, Asantha |
| description | We use the cosmic microwave background (CMB) anisotropy data from Planck to constrain the spatial fluctuations of the fine-structure constant or 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 ( delta alpha / alpha ) sub(rms) < 3.4 x 10 super(3) at the 68% confidence level. We find no evidence for a spatially varying a at a redshift of 10 super(3). |
| doi_str_mv | 10.1088/0004-637X/798/1/18 |
| format | Article |
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| source | EZB-FREE-00999 freely available EZB journals; Institute of Physics Open Access Journal Titles; Alma/SFX Local Collection |
| subjects | ANISOTROPY ASTROPHYSICS, COSMOLOGY AND ASTRONOMY BACKGROUND RADIATION Confidence intervals Constants CORRELATION FUNCTIONS Cosmic microwave background Estimators FINE STRUCTURE Fluctuation FLUCTUATIONS INFLATIONARY UNIVERSE LIMITING VALUES Line of sight RED SHIFT RELICT RADIATION Scattering SURFACES |
| title | CONSTRAINTS ON SPATIAL VARIATIONS IN THE FINE-STRUCTURE CONSTANT FROM PLANCK |
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