Induced two-photon decay of the 2s level and the rate of cosmological hydrogen recombination

被引：105

作者：

Chluba, J

Sunyaev, RA

机构：

[1] Max Planck Inst Astrophys, D-86740 Garching, Germany

[2] Russian Acad Sci, Space Res Inst, Moscow, Russia

来源：

ASTRONOMY & ASTROPHYSICS | 2006年 / 446卷 / 01期

关键词：

cosmology : cosmic microwave background; cosmology : miscellaneous;

D O I：

10.1051/0004-6361:20053988

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Induced emission due to the presence of soft CMB photons slightly increases the two- photon decay rate of the 2s level of hydrogen defining the rate of cosmological recombination. This correspondingly changes the degree of ionization, the visibility function and the resulting primordial temperature anisotropies and polarization of the CMB on the percent level. These changes exceed the precision of the widely used CMBFAST and Camb codes by more than one order of magnitude and can be easily taken into account.

引用

页码：39 / 42

页数：4

共 20 条

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