Dark Radiation Emerging After Big Bang Nucleosynthesis?

Details Dark Radiation Emerging After Big Bang Nucleosynthesis? Dark Radiation Emerging After Big Bang Nucleosynthesis?

2010-11-15

arxiv.org/abs/1011.3501v3

Phys.Rev.D83:063520,2011

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

v3: 5 pages, 1 figure. References added, typos corrected, notation changed throughout. v2: 5 pages, 1 figure. Reformatted, ref

Scientific paper

10.1103/PhysRevD.83.063520

We show how recent data from observations of the cosmic microwave background may suggest the presence of additional radiation density which appeared after big bang nucleosynthesis. We propose a general scheme by which this radiation could be produced from the decay of non-relativistic matter, we place constraints on the properties of such matter, and we give specific examples of scenarios in which this general scheme may be realized.

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