Cosmological constraints on alternative model to Chaplygin fluid revisited

A. Hernández-Almada; Juan Magaña; Miguel A. García-Aspeitia; V. Motta

doi:10.1140/epjc/s10052-018-6521-6

EPJ

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2023 Impact factor 4.2

Particles and Fields

Open Access

Eur. Phys. J. C (2019) 79: 12
https://doi.org/10.1140/epjc/s10052-018-6521-6

Regular Article - Theoretical Physics

Cosmological constraints on alternative model to Chaplygin fluid revisited

A. Hernández-Almada¹^*, Juan Magaña², Miguel A. García-Aspeitia³^,4 and V. Motta²

¹ Facultad de Ingeniería, Universidad Autónoma de Querétaro, Centro Universitario Cerro de las Campanas, 76010, Santiago de Querétaro, Mexico
² Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Avda. Gran Bretaña 1111, Valparaiso, Chile
³ Unidad Académica de Física, Universidad Autónoma de Zacatecas, Calzada Solidaridad esquina con Paseo a la Bufa S/N, CP 98060, Zacatecas, Mexico
⁴ Consejo Nacional de Ciencia y Tecnología, Av. Insurgentes Sur 1582. Colonia Crédito Constructor, Del. Benito Juárez, CP 03940, Mexico City, Mexico

^* e-mail: ahalmada@uaq.mx

Received: 3 September 2018
Accepted: 13 December 2018
Published online: 7 January 2019

Abstract

In this work we explore an alternative phenomenological model to Chaplygin gas proposed by Hova et al. (Int J Mod Phys D 26:1750178, 2017), consisting on a modification of a perfect fluid, to explain the dynamics of dark matter and dark energy at cosmological scales immerse in a flat or curved universe. Adopting properties similar to a Chaplygin gas, the proposed model is a mixture of dark matter and dark energy components parameterized by only one free parameter denoted as $\mu$ . We focus on contrasting this model with the most recent cosmological observations of Type Ia supernovae and Hubble parameter measurements. Our joint analysis yields a value $\mu = 0.843^{+0.014}_{-0.015}\,$ ( $0.822^{+0.022}_{-0.024}$ ) for a flat (curved) universe. Furthermore, with these constraints we also estimate the deceleration parameter today $q_0=-0.67 \pm 0.02\,(-0.51\pm 0.07)$ , the acceleration-deceleration transition redshift $z_t=0.57\pm 0.04\, (0.50 \pm 0.06)$ , and the universe age $t_A = 13.108^{+0.270}_{-0.260}\,\times (12.314^{+0.590}_{-0.430})\,$ Gyrs. We also report a best value of $\varOmega _k = 0.183^{+0.073}_{-0.079}$ consistent at $3\sigma$ with the one reported by Planck Collaboration. Our analysis confirm the results by Hova et al. this Chaplygin gas-like is a plausible alternative to explain the nature of the dark sector of the universe.