New constraints on Coupled Dark Energy from the Planck satellite experiment - INSPIRE

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New constraints on Coupled Dark Energy from the Planck satellite experiment

Valentina Salvatelli
(
- Rome U. and
- INFN, Rome
)
,
Andrea Marchini
(
- Rome U. and
- INFN, Rome
)
,
Laura Lopez-Honorez
(
- Vrije U., Brussels and
- Intl. Solvay Inst., Brussels
)
,
Olga Mena
(
- Valencia U., IFIC
)

Apr 26, 2013

9 pages

Published in:

Phys.Rev.D 88 (2013) 2, 023531

Published: Jul 24, 2013

e-Print:

1304.7119 [astro-ph.CO]

DOI:

10.1103/PhysRevD.88.023531

View in:

ADS Abstract Service

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Abstract: (APS)

We present new constraints on coupled dark energy from the recent measurements of the cosmic microwave background anisotropies from the Planck satellite mission. We found that a coupled dark energy model is fully compatible with the Planck measurements, deriving a weak bound on the dark matter–dark energy coupling parameter ξ=-0.49-0.31+0.19 at 68% C.L. Moreover if Planck data are fitted to a coupled dark energy scenario, the constraint on the Hubble constant is relaxed to H0=72.1-2.3+3.2 km/s/Mpc, solving the tension with the Hubble Space Telescope (HST) value. We show that a combined PLANCK+HST analysis provides significant evidence for coupled dark energy finding a nonzero value for the coupling parameter ξ, with -0.90<ξ<-0.22 at 95% C.L. We also consider the combined constraints from the Planck data plus the baryon acoustic oscillation measurements of the 6dF Galaxy Survey, the Sloan Digital Sky Survey and the Baron Oscillation Spectroscopic Survey.

Note:

9 pages, 10 figures, 3 Table. Accepted on PRD on 24 July 2013. Last arXiv version updated to the published version(BAO datasets and w-varying constraints are now included)

98.80.Es
98.80.Jk
95.30.Sf
dark energy: coupling
satellite: Planck
energy: coupling
cosmic background radiation: anisotropy
oscillation: acoustic
sloan digital sky survey
Hubble constant

References(36)

Figures(28)

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