Prospects for an independent measurement of =1,2,3 CMB anisotropy multipoles using the anisotropic Sunyaev-Zel'dovich effect
astro-ph.CO, astro-ph.IM
Submitted: 2025-12-08
Updated: 2026-09-15
Comments: Published in Physical Review D, 9 pages, 4 figures
DOI: 10.1103/vd13-8dbj
License: http://creativecommons.org/licenses/by/4.0/
The gist: We investigate the prospects for observing a specific spectral distortion of the cosmic microwave background, which occurs due to the anisotropy of the radiation when it is scattered by hot plasma of
Terminology
Abstract
We investigate the prospects for observing a specific spectral distortion of the cosmic microwave background, which occurs due to the anisotropy of the radiation when it is scattered by hot plasma of galaxy clusters. Detection of this anisotropic Sunyaev-Zel'dovich effect would enable an independent measurement of the CMB anisotropy multipoles with = 1, 2, 3, allow the Sachs-Wolfe and integrated Sachs-Wolfe (Rees-Sciama) effects to be separated, and partially solve the cosmic variance problem for low multipoles. We applied the Least Response Method for component separation in the data processing and estimated the required sensitivity of the experiment for such observations. We test our approach on a simulated signal that is contaminated by various foregrounds with poorly defined spectral shapes, along with distortions of the relic blackbody spectrum caused by the Sunyaev-Zel'dovich effect and its relativistic corrections.
Sources
- CMB Cold Spot from Inflationary Feature Scattering
- Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Final Maps and Results
- Planck 2013 results. XV. CMB power spectra and likelihood
- Planck 2018 results. IV. Diffuse component separation
- Large-angle anomalies in the CMB
- Can a supervoid explain the Cold Spot?
- Planck 2015 results. XVI. Isotropy and statistics of the CMB
- CMB Anomalies after Planck
- Asymmetry of the CMB map: local and global anomalies
- A fast and accurate method for computing the Sunyaev-Zeldovich signal of hot galaxy clusters
- Multiple scattering Sunyaev-Zeldovich signal I: lowest order effect
- Multiple scattering Sunyaev-Zeldovich signal II: relativistic effects
- Analytical Study on the Sunyaev-Zeldovich Effect for Clusters of Galaxies
- Analytical studies on the Sunyaev Zeldovich effect in the cluster of galaxies for three Lorentz frames
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- Spectral distortions of the CMB dipole
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- Low-resolution spectroscopy of the Sunyaev-Zel'dovich effect and estimates of cluster parameters
- Taking the Universe's Temperature with Spectral Distortions of the Cosmic Microwave Background
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