Cosmological Hydrogen Recombination: influence of resonance and electron scattering
Cosmological Hydrogen Recombination: influence of resonance and electron scattering
复制标题
宇宙氢复合：共振和电子散射的影响
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
R. Sunyaev
中科院分区：
文献类型：
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作者：
J. Chluba;R. Sunyaev
本文研究了共振和电子散射对宇宙氢复合过程中莱曼α光子逃逸的影响。利用描述光子散射的再分布函数的Fokker-Planck近似，研究了原子反冲、多普勒增强和多普勒展宽对运动氢原子莱曼α共振的影响.我们扩展了我们最近关于3d /3s-1 s双光子通道对氢复合动力学的影响的论文的计算，同时包括了问题的全部时间依赖性，热力学修正因子，导致发射和吸收轮廓之间的频率依赖性不对称性，以及与3d/3s-1 s发射和吸收过程的双光子性质有关的量子力学修正对莱曼α发射轮廓的精确形状的影响。我们在这里表明，由于光子在频率上的重新分布，氢的复合速度加快
In this paper we consider the effects of resonance and electron scattering on the escape of Lymanα photons during cosmological hydrogen recombination. We pay particular attention to the influence of atomic recoil, Doppler boosting and Doppler broadening using a Fokker-Planck approximation of the redistribution function describing the scattering of photons on the Lymanα resonance of moving hydrogen atoms. We extend the computations of our recent paper on the influence of the 3d /3s-1s two-photon channels on the dynamics of hydrogen recombination, simultaneously including the full time-dependence of the problem, the thermodynamic corrections factor, leading to a frequency-dependent asymmetry between the emission and absorption profile, and the quantummechanical corrections related to the two-photon nature of the 3d/3s-1s emission and absorption process on the exact shape of the Lymanα emission profile. We show here that due to the redistribution of photons over frequency hydrogen recombination is sped up