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On the Dark Sector Interactions

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arxiv 0912.1943 v2 pith:3X4DQM6X submitted 2009-12-10 astro-ph.CO gr-qchep-th

classification astro-ph.COgr-qchep-th
keywords interactingdarkdeltaformsinteractioninteractionsphenomenologicalpossible
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

It is possible that there exist some interactions between dark energy (DE) and dark matter (DM), and a suitable interaction can alleviate the coincidence problem. Several phenomenological interacting forms are proposed and are fitted with observations in the literature. In this paper we investigate the possible interaction in a way independent of specific interacting forms by use of observational data (SNe, BAO, CMB and Hubble parameter). We divide the whole range of redshift into a few bins and set the interacting term $\delta(z)$ to be a constant in each redshift bin. We consider four parameterizations of the equation of state $w_{de}$ for DE and find that $\delta(z)$ is likely to cross the non-interacting ($\delta=0$) and have an oscillation form. It suggests that to study the interaction between DE and DM, more general phenomenological forms of the interacting term should be considered.

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Forward citations

Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 107 citations worldwide. Full citation record

  1. Positive neutrino masses with DESI DR2 via matter conversion to dark energy

    astro-ph.CO 2025-04 conditional novelty 6.0 of 10

    A model where stellar collapse to cosmologically coupled black holes converts baryons into dark energy, fit to DESI DR2 and Planck data, yields a positive summed neutrino mass around 0.05 to 0.11 eV, in agreement with...

  2. Study of dark interactions through strong gravitational lenses

    astro-ph.CO 2026-05 unverdicted novelty 5.0 of 10

    Strong gravitational lensing data from early-type galaxies and Abell 1689 constrain three sign-changeable dark-sector interaction models, yielding negative interaction strengths larger in magnitude than prior probes a...

  3. Strong gravitational lensing constraints on interacting dark energy models

    astro-ph.CO 2026-07 conditional novelty 4.0 of 10

    Joint galaxy+cluster strong-lensing data favor Ω_dm0≈0.253 and β≈−0.83 for a q-dependent interacting dark-energy model, implying earlier acceleration (z_t≈2.33) than ΛCDM.

  4. 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...

  5. Dark Energy in the DESI Era: A Brief Review of Evidence, Beyond-$\Lambda$CDM Interpretations, and Tensions

    astro-ph.CO 2026-06 unverdicted novelty 3.0 of 10

    Review of DESI evidence for dynamical dark energy, its dependence on parametrization and datasets, and alternative beyond-LambdaCDM interpretations that may address cosmological tensions.

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