Regular Article - Theoretical Physics
Reducing the tension with exponential acoustic dark energy
Center for Quantum Spacetime, Sogang University, 04107, Seoul, Korea
2 Department of Physics, Sogang University, 04107, Seoul, Korea
Accepted: 12 January 2022
Published online: 27 January 2022
The Hubble tension arises from different observations between the late-time and early Universe. We explore a new model with dark fluid, called the exponential acoustic dark energy (eADE) model, to relieve the Hubble tension. The eADE model gives an exponential form of the equation of state (EoS) in the acoustic dark energy, which is the first time to explore an exponential form for the EoS. In this model, the gravitational effects from the acoustic oscillations of the model can impact the CMB phenomena at the matter radiation equally epoch. We give the constraints of the eADE model by the current cosmological dataset. The comparison of the phenomena with the standard model can be shown through CMB and matter power spectra. The fitting results of our model have in 95 C.L. and a smaller best-fit value than CDM.
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