B-mode Power Spectrum of CMB via Polarized Compton Scattering
Sep 2, 2019
20 pages
Published in:
- JCAP 01 (2020) 051
- Published: Jan 27, 2020
e-Print:
- 1909.00568 [astro-ph.CO]
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Abstract: (IOP)
In this work, some evidences for existing an asymmetry in the density of left- and right-handed cosmic electrons (δL and δR respectively) in universe motivated us to calculate the dominated contribution of this asymmetry in the generation of the B-mode power spectrum. In the standard cosmological scenario, Compton scattering in the presence of scalar matter perturbation can not generate magnetic-like pattern in linear polarization CBl(S)=0 while in the case of polarized Compton scattering CBl(S)∝ δL2. By adding up the power spectrum of the B-mode generated by the polarized Compton scattering to power spectra produced by weak lensing effects and Compton scattering in the presence of tensor perturbations, we show that there is a significant amplification in CBl in large scale l<500 for δL>10−6, which can be observed in future experiments. Finally, we have shown that CBl(S) generated by polarized Compton scattering can suppress the tensor-to-scalar ratio (r-parameter) so that this contamination can be comparable to a primordial tensor-to-scalar ratio spatially for δL>10−5.Note:
- 20 pages,3 figures
- perturbation: tensor
- cosmic background radiation: power spectrum
- electron: right-handed
- polarization: linear
- matter: perturbation
- matter: scalar
- Compton scattering
- cosmic background radiation: B-mode
- asymmetry
- resolution
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