تقرير
Planck constraints on cross-correlations between anisotropic cosmic birefringence and CMB polarization
| العنوان: | Planck constraints on cross-correlations between anisotropic cosmic birefringence and CMB polarization |
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| المؤلفون: | Bortolami, Marco, Billi, Matteo, Gruppuso, Alessandro, Natoli, Paolo, Pagano, Luca |
| سنة النشر: | 2022 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | Cosmic Birefringence (CB) is the in-vacuo rotation of the linear polarization direction of photons during propagation, caused by parity-violating extensions of Maxwell electromagnetism. We build low resolution CB angle maps using Planck Legacy and NPIPE products and provide for the first time estimates of the cross-correlation spectra $C_L^{\alpha E}$ and $C_L^{\alpha B}$ between the CB and the CMB polarization fields. We also provide updated CB auto-correlation spectra $C_L^{\alpha\alpha}$ as well as the cross-correlation $C_L^{\alpha T}$ with the CMB temperature field. We report constraints by defining the scale-invariant amplitudes $A^{\alpha X} \equiv L(L + 1)C_L^{\alpha X}/2\pi$, where $X = \alpha, T, E, B$, finding no evidence of CB. In particular, we find $A^{\alpha E} = (-7.8 \pm 5.6)$ nK deg and $A^{\alpha B} = (0.3 \pm 4.0)$ nK deg at 68% C.L.. Comment: 24 pages, 14 figures. Accepted for publication in JCAP |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/1475-7516/2022/09/075 |
| الوصول الحر: | http://arxiv.org/abs/2206.01635Test |
| رقم الانضمام: | edsarx.2206.01635 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/1475-7516/2022/09/075 |
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