Planck constraints on Cosmic Birefringence and its cross-correlation with the CMB
arxiv(2024)
摘要
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.
更多查看译文
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要