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Power Spectrum Constraints from Spectral Distortions in the Cosmic Microwave Background

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arxiv astro-ph/9402045 v2 pith:3POJ2LQS submitted 1994-02-17 astro-ph

Wayne Hu , Douglas Scott , & Joseph Silk This is my paper · ORCID
classification astro-ph
keywords omegacobeconstraintsdampingdistortionsfluctuationspowerscale
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abstract

%The content of this replacement paper is identical to the original. %We have attempted to fix the postscript so that it will print out on %a larger number of printers. Using recent experimental limits on $\mu$ distortions from COBE FIRAS, and the large lever-arm spanning the damping of sub-Jeans scale fluctuations to the scale of the COBE DMR fluctuations, we set a constraint on the slope of the primordial power spectrum $n$. It is possible to analytically calculate the contribution over the full range of scales and redshifts, correctly taking into account fluctuation growth and damping as well as thermalization processes. We find that the 95\% upper limit is weakly dependent on cosmological parameters, e.g. $n<1.54 (h=0.5)$ and $n<1.56 (h=1.0)$ for $\Omega_0=1$ with marginally weaker constraints for $\Omega_0<1$ in a flat $\Omega_0 +\Omega_\Lambda=1$ universe.

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Forward citations

Cited by 5 Pith papers

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  4. 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.

  5. The Cosmic Microwave Background: Spectral Distortions

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