Future CMB cosmological constraints in a dark coupled universe

Details Future CMB cosmological constraints in a dark coupled universe Future CMB cosmological constraints in a dark coupled universe

2010-04-14

arxiv.org/abs/1004.2410v1

Phys.Rev.D81:103534,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

6 pages, 6 figures

Scientific paper

10.1103/PhysRevD.81.103534

Cosmic Microwave Background satellite missions as the on-going Planck experiment are expected to provide the strongest constraints on a wide set of cosmological parameters. Those constraints, however, could be weakened when the assumption of a cosmological constant as the dark energy component is removed. Here we show that it will indeed be the case when there exists a coupling among the dark energy and the dark matter fluids. In particular, the expected errors on key parameters as the cold dark matter density and the angular diameter distance at decoupling are significantly larger when a dark coupling is introduced. We show that it will be the case also for future satellite missions as EPIC, unless CMB lensing extraction is performed.

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