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BISOU: a balloon project to measure the CMB spectral distortions
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The BISOU (Balloon Interferometer for Spectral Observations of the Universe) project aims to study the viability and prospects of a balloon-borne spectrometer, pathfinder of a future space mission dedicated to the measurements of the CMB spectral distortions. We present here a preliminary concept based on previous space mission proposals, together with some sensitivity calculation results for the observation goals, showing that a 5-sigma measurement of the y-distortions is achievable.
Forward citations
Cited by 3 Pith papers
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The late-time heating Green's function and improvements to distortion frequency hierarchy treatment
The paper extends CMB spectral distortion Green's functions to post-recombination redshifts and calibrates the Frequency Hierarchy treatment with a corrected critical frequency and a CosmoTherm-derived mu spectral template.
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The Glow of Axion Quark Nugget Dark Matter: (IV) CMB Spectral and Anisotropy Signatures
Axion quark nugget dark matter would create a μ-type CMB spectral distortion near 6×10⁻⁸ with y near 2×10⁻⁹, detectable by proposed missions, while leaving CMB anisotropies essentially unchanged.
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The Cosmic Microwave Background: Spectral Distortions
A review of CMB spectral distortion theory and prospects, covering the standard y and mu distortions, guaranteed Lambda-CDM signals, and future spectrometer experiments.
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