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Constraining a dark matter and dark energy interaction scenario with a dynamical equation of state

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arxiv 1705.09278 v1 pith:24BPNKAS submitted 2017-05-25 astro-ph.CO gr-qc

Weiqiang Yang , Narayan Banerjee , Supriya Pan This is my paper · ORCID
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keywords darkenergymattercosmicequationinteractionmeasurementsparameter
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abstract

In this work we have used the recent cosmic chronometers data along with the latest estimation of the local Hubble parameter value, $H_0$ at 2.4\% precision as well as the standard dark energy probes, such as the Supernovae Type Ia, baryon acoustic oscillation distance measurements, and cosmic microwave background measurements (PlanckTT $+$ lowP) to constrain a dark energy model where the dark energy is allowed to interact with the dark matter. A general equation of state of dark energy parametrized by a dimensionless parameter `$\beta$' is utilized. From our analysis, we find that the interaction is compatible with zero within the 1$\sigma$ confidence limit. We also show that the same evolution history can be reproduced by a small pressure of the dark matter.

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Cited by 3 Pith papers

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

  1. Entropic Chaplygin-Gas cosmology and late-universe tension diagnostics

    gr-qc 2026-07 conditional novelty 5.0 of 10

    An entropic Chaplygin-gas dark sector can shift fitted H0 values, but the shift and any tension relief depend on supernova calibration and vanish with DES-Dovekie data.

  2. Dark Energy Is Not That Into You: Variable Couplings after DESI DR2 BAO

    astro-ph.CO 2025-08 conditional novelty 4.0 of 10

    With DESI DR2 data, one interacting dark sector model with a time-dependent coupling shows a nonzero coupling at more than 95% CL, but Bayesian evidence still favors Lambda-CDM.

  3. Solving an Interacting Quintessence Model with a Sound Horizon Initial Condition and its Observational Constraints

    gr-qc 2025-07 conditional novelty 4.0 of 10

    An interacting quintessence model with initial conditions set by the CMB sound horizon angle increases H0 with coupling strength, but observational constraints show it does not resolve the H0 or S8 tensions.

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