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The Pesky Power Asymmetry

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arxiv 1303.6949 v1 pith:FBL2VFJZ submitted 2013-03-27 astro-ph.CO

classification astro-ph.CO
keywords powerasymmetrymodelsconstraintsamplitudeasymmetriesbackgroundcollaboration
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Physical models for the hemispherical power asymmetry in the cosmic microwave background (CMB) reported by the Planck Collaboration must satisfy CMB constraints to the homogeneity of the Universe and quasar constraints to power asymmetries. We survey a variety of models for the power asymmetry and show that consistent models include a modulated scale-dependent isocurvature contribution to the matter power spectrum or a modulation of the reionization optical depth, gravitational-wave amplitude, or scalar spectral index. We propose further tests to distinguish between the different scenarios.

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Forward citations

Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 98 citations worldwide. Full citation record

  1. The Boost Operator: Properties, Computation and Applications

    astro-ph.CO 2025-05 accept novelty 7.0 of 10

    The boost operator for frequency-dependent sky signals equals the aberration kernel evaluated with the Doppler weight replaced by -nu d/dnu, allowing direct computation to second order in v/c.

  2. Constraining Scale-Dependent Growth in $f(R)$ Gravity with Future 21 cm Surveys

    astro-ph.CO 2026-06 unverdicted novelty 3.0 of 10

    Forecasts show that future 21 cm surveys can deliver moderate constraints on the scale-dependent growth index and HI bias in viable f(R) models.

  3. New Horizons in Cosmology with Spectral Distortions of the Cosmic Microwave Background

    astro-ph.CO 2019-09 unverdicted novelty 3.0 of 10

    A white paper advocating for a CMB spectral distortion mission to detect predicted mu, y, and recombination signals and probe inflation, dark matter, and particle physics.

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