Cosmological implications of a relic neutrino asymmetry

被引:100
作者
Lesgourgues, J
Pastor, S
机构
[1] SISSA ISAS, I-34013 Trieste, Italy
[2] Ist Nazl Fis Nucl, I-34013 Trieste, Italy
来源
PHYSICAL REVIEW D | 1999年 / 60卷 / 10期
关键词
D O I
10.1103/PhysRevD.60.103521
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We consider some consequences of the presence of a cosmological lepton asymmetry in the form of neutrinos. A relic neutrino degeneracy enhances the contribution of massive neutrinos to the present energy density of the Universe, and modifies the power spectrum of radiation and matter. Comparing with current observations of cosmic microwave background anisotropies and large-scale structure, we derive some constraints on the neutrino degeneracy and on the spectral index in the case of a flat universe with a cosmological constant. [S0556-2821(99)03222-1].
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页数:3
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