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The imprint of the interaction between dark sectors in large scale cosmic microwave background anisotropies

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arxiv 0906.0677 v2 pith:EZHYTP2A submitted 2009-06-03 gr-qc astro-ph.COhep-th

classification gr-qcastro-ph.COhep-th
keywords darkcouplinglargescalecosmicinteractionsectorsanisotropies
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Dark energy interacting with dark matter is a promising model to solve the cosmic coincidence problem. We study the signature of such interaction on large scale cosmic microwave background (CMB) temperature anisotropies. Based on the detail analysis in perturbation equations of dark energy and dark matter when they are in interaction, we find that the large scale CMB, especially the late Integrated Sachs Wolfe effect, is a useful tool to measure the coupling between dark sectors. We also discuss the possibility to detect the coupling by cross-correlating CMB maps with tracers of the large scale structure. We finally perform the global fitting to constrain the coupling by using the CMB power spectrum data together with other observational data. We find that in the $1\sigma$ range, the constrained coupling between dark sectors can solve the coincidence problem.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The model-independent degeneracy-breaking point in cosmological models with interacting Dark Energy and Dark Matter

    astro-ph.CO 2019-08 conditional novelty 4.0 of 10

    In interacting dark energy models, the interaction term becomes independent of the constant dark energy equation of state at a specific redshift (about z=1.4), giving a point where the interaction can be observed with...

  2. Quantifying the impacts of future gravitational-wave data on constraining interacting dark energy

    astro-ph.CO 2019-08 conditional novelty 4.0 of 10

    Adding 1000 simulated Einstein Telescope standard sirens to current CMB, BAO, and supernova data would tighten H0 and matter density constraints by factors of 2 to 3 in four interacting dark energy models, with modest...

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