论文标题
对原始磁场的限制，其对Planck 2018的电离历史的影响
Constraints on Primordial Magnetic Fields from their impact on the ionization history with Planck 2018
论文作者
论文摘要
我们通过双极扩散和MHD衰减湍流对重组后电离历史的耗散效果，通过其耗散来更新和扩展原始磁场对原始磁场的限制。 We derive the constraints using the latest Planck 2018 data release which improves on the E-mode polarization leading to overall tighter constraints with respect to Planck 2015. We also use the low-multipole E-mode polarization likelihood obtained by the SROLL2 map making algorithm and we note how it is compatible with larger magnetic field amplitudes than the Planck 2018 baseline, especially for positive spectral indices.效果组合对磁场幅度的95％Cl限制为$ \ sqrt {\ langle b^2 \ rangle} <0.69 <0.69（<0.72）$ ng planck 2018（sroll2）（sroll2）通过在磁性光谱指数上进行边缘化。我们还研究了允许变化的阻尼量表以及磁场效应与透镜幅度参数之间的相互作用的影响。
We update and extend our previous CMB anisotropy constraints on primordial magnetic fields through their dissipation by ambipolar diffusion and MHD decaying turbulence effects on the post-recombination ionization history. We derive the constraints using the latest Planck 2018 data release which improves on the E-mode polarization leading to overall tighter constraints with respect to Planck 2015. We also use the low-multipole E-mode polarization likelihood obtained by the SROLL2 map making algorithm and we note how it is compatible with larger magnetic field amplitudes than the Planck 2018 baseline, especially for positive spectral indices. The 95% CL constraints on the amplitude of the magnetic fields from the combination of the effects is $\sqrt{\langle B^2 \rangle} <0.69 (<0.72)$ nG for Planck 2018 (SROLL2) by marginalizing on the magnetic spectral index. We also investigate the impact of a damping scale allowed to vary and the interplay between the magnetic field effects and the lensing amplitude parameter.
