https://doi.org/10.1140/epjc/s10052-021-09104-w
Regular Article – Theoretical Physics
A hybrid model of viscous and Chaplygin gas to tackle the Universe acceleration
1
Facultad de Ingeniería, Centro Universitario Cerro de las Campanas, Universidad Autónoma de Querétaro, 76010, Santiago de Querétaro, Mexico
2
Unidad Académica de Física, Universidad Autónoma de Zacatecas, Calzada Solidaridad esquina con Paseo a la Bufa S/N C.P., 98060, Zacatecas, Mexico
3
Consejo Nacional de Ciencia y Tecnología, Av. Insurgentes Sur 1582. Colonia Crédito Constructor, Del. Benito Juárez C.P., 03940, Mexico City, Mexico
4
Departamento de Física, Instituto Nacional de Investigaciones Nucleares, Apartado Postal 18-1027, 11801, Mexico City, Mexico
5
Facultad de Ciencias, Instituto de Física y Astronomía, Universidad de Valparaíso, Avda. Gran Bretaña, 1111, Valparaiso, Chile
Received:
20
January
2021
Accepted:
30
March
2021
Published online:
8
April
2021
Motivated by two seminal models proposed to explain the Universe acceleration, this paper is devoted to study a hybrid model which is constructed through a generalized Chaplygin gas with the addition of a bulk viscosity. We call the model a viscous generalized Chaplygin gas (VGCG) and its free parameters are constrained through several cosmological data like the Observational Hubble Parameter, Type Ia Supernovae, Baryon Acoustic Oscillations, Strong Lensing Systems, HII Galaxies and using Joint Bayesian analysis. In addition, we implement a Om-diagnostic to analyze the VGCC dynamics and its difference with the standard cosmological model. The hybrid model shows important differences when compared with the standard cosmological model. Finally, based on our Joint analysis we find that the VGCG could be an interesting candidate to alleviate the well-known Hubble constant tension.
© The Author(s) 2021
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