Planck constraints on Cosmic Birefringence and its cross-correlation with the CMB
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866916101585108992 |
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| author | Zagatti, G. Bortolami, M. Gruppuso, A. Natoli, P. Pagano, L. Fabbian, G. |
| author_facet | Zagatti, G. Bortolami, M. Gruppuso, A. Natoli, P. Pagano, L. Fabbian, G. |
| contents | Cosmic birefringence is the in-vacuo, frequency independent rotation of the polarization plane of linearly polarized radiation, induced by a parity-violating term in the electromagnetic Lagrangian. We implement an harmonic estimator for the birefringence field that only relies on the CMB E to B mode cross-correlation, thus suppressing the effect of cosmic variance from the temperature field. We derive constraints from Planck public releases 3 and 4, revealing a cosmic birefringence power spectrum consistent with zero at about $2σ$ up to multipole $L=1500$. Moreover, we find that the cross-correlations of cosmic birefringence with the CMB T-, E- and B-fields are also well compatible with null. The latter two cross-correlations are provided here for the first time up to $L=1500$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_11973 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Planck constraints on Cosmic Birefringence and its cross-correlation with the CMB Zagatti, G. Bortolami, M. Gruppuso, A. Natoli, P. Pagano, L. Fabbian, G. Cosmology and Nongalactic Astrophysics Cosmic birefringence is the in-vacuo, frequency independent rotation of the polarization plane of linearly polarized radiation, induced by a parity-violating term in the electromagnetic Lagrangian. We implement an harmonic estimator for the birefringence field that only relies on the CMB E to B mode cross-correlation, thus suppressing the effect of cosmic variance from the temperature field. We derive constraints from Planck public releases 3 and 4, revealing a cosmic birefringence power spectrum consistent with zero at about $2σ$ up to multipole $L=1500$. Moreover, we find that the cross-correlations of cosmic birefringence with the CMB T-, E- and B-fields are also well compatible with null. The latter two cross-correlations are provided here for the first time up to $L=1500$. |
| title | Planck constraints on Cosmic Birefringence and its cross-correlation with the CMB |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2401.11973 |