An interacting dark energy model with a linear equation-of-state parametrization is fitted to low-redshift data, yielding a fitted H0 of 75.6 for one dataset, but the model's H(z) does not satisfy its own Friedmann equations at z=0.
Testing the phenomenological interacting dark energy model with gamma-ray bursts and Pantheon+ type Ia supernovae
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abstract
In this paper, we utilize recent observational data from gamma-ray bursts (GRBs) and Pantheon+ supernovae Ia (SNe Ia) sample to explore the interacting dark energy (IDE) model in a phenomenological scenario. Results from GRBs alone, SNe Ia and GRBs+SNe Ia indicate that the energy is transferred from dark energy to dark matter and the coincidence problem is alleviated. The value of $H_0$ from GRBs+SNe Ia in the IDE scenario shows agreement with the SH0ES measurement. Considering the age estimate of the quasar APM 08279+5255 at $z = 3.91$, we find that the phenomenological IDE scenario can predict a cosmic age greater than that of the $\Lambda$CDM model, thus the cosmic age problem can be alleviated.
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Exploring parametrized dark energy models in interacting scenario
An interacting dark energy model with a linear equation-of-state parametrization is fitted to low-redshift data, yielding a fitted H0 of 75.6 for one dataset, but the model's H(z) does not satisfy its own Friedmann equations at z=0.