تقرير
Planck constraints on Cosmic Birefringence and its cross-correlation with the CMB
| العنوان: | Planck constraints on Cosmic Birefringence and its cross-correlation with the CMB |
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| المؤلفون: | Zagatti, G., Bortolami, M., Gruppuso, A., Natoli, P., Pagano, L., Fabbian, G. |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | 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 $2\sigma$ 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 $L=1500$. Comment: 30 pages, 13 figures. To be submitted to JCAP. Code available https://github.com/paganol/alpha_lm . Data available https://github.com/giorgiazagatti/CB_Planck_maps_spectra.git |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2401.11973 |
| رقم الأكسشن: | edsarx.2401.11973 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |