B-mode Power Spectrum of CMB via Polarized Compton Scattering
| Autor: | Mahdi Sadegh, Rohoollah Mohammadi, Jafar Khodagholizadeh, Ali Vahedi |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
High Energy Physics - Theory High Energy Astrophysical Phenomena (astro-ph.HE) Particle physics Cosmology and Nongalactic Astrophysics (astro-ph.CO) 010308 nuclear & particles physics Linear polarization media_common.quotation_subject Scalar (mathematics) Compton scattering Spectral density FOS: Physical sciences Astronomy and Astrophysics Electron 01 natural sciences Asymmetry High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) High Energy Physics - Theory (hep-th) 0103 physical sciences Tensor Astrophysics - High Energy Astrophysical Phenomena Weak gravitational lensing media_common Astrophysics - Cosmology and Nongalactic Astrophysics |
| DOI: | 10.48550/arxiv.1909.00568 |
| Popis: | In this work, according to some evidence from being an asymmetry in the number density of left and right-handed electrons, $\delta_L$, in-universe motivate us to calculate the dominated contribution of this asymmetry in the generation of B-mode power spectrum $C_{ B\,l}^{(S)}$. Note, in the standard cosmological scenario, Compton scattering in the presence of scalar matter perturbation can not generate magnetic like pattern in linear polarization while in the case of polarized Compton scattering, we have shown $C_{B\,l}^{(S)}\propto \delta_L^2$. We add up the spectrum of the B-mode generated by the polarized Compton scattering to the spectra produced by weak lensing effects and Compton scattering in the presence of tensor perturbations. The results show a significant amplification in $C_{B\,l}$ in large scale $l10^{-6}$ which will be observable in future high resolution B-mode polarization detection. Finally, we have shown that $C_{ B\,l}^{(S)}$ 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 $\delta_L>10^{-5}$. Comment: 20 pages,3 figures |
| Databáze: | OpenAIRE |
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