Scalar field dark energy: Insights into cosmological evolution and black hole accretion

Abstract

We propose a novel approach to parameterize the equation of state for Scalar Field Dark Energy (SFDE) and use it to derive analytical solutions for various cosmological parameters. Using statistical MCMC with Bayesian techniques, we obtain constraint values for the model parameters and analyze three observational datasets. We find a quintessence-like behavior for Dark Energy (DE) with positive values for both model parameters $\alpha$ and $\beta$. Our analysis of the $CC$+$BAO$+$SNe$ datasets reveals that the transition redshift and the current value of the deceleration parameter are $z_{tr}=0.73_{-0.01}^{+0.03}$ and $q_0=-0.44_{-0.02}^{+0.03}$, respectively. We also investigate the fluid flow of accretion SFDE around a Black Hole (BH) and analyze the nature of the BH's dynamical mass during accretion, taking into account Hawking radiation and BH evaporation. Our proposed model offers insight into the nature of DE in the Universe and the behavior of BHs during accretion.

The European Physical Journal Plus accepted veriosn

References in corpus (24)

• Dynamics of dark energy
• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• Raising the bar: new constraints on the Hubble parameter with cosmic chronometers at z$\sim$2
• Two new diagnostics of dark energy
• Conditions for the cosmological viability of f(R) dark energy models
• WMAP constraints on low redshift evolution of dark energy
• Hubble parameter measurement constraints on the redshift of the deceleration-acceleration transition, dynamical dark energy, and space curvature
• Large Scale Structure as a Probe of Gravitational Slip
• Correcting Type Ia Supernova Distances for Selection Biases and Contamination in Photometrically Identified Samples
• Towards an automated tool to evaluate the impact of the nuclear modification of the gluon density on quarkonium, D and B meson production in proton-nucleus collisions
• Charged Black Holes in Phantom Cosmology
• Holographic tachyon model
• Anisotropic nature of space-time in $f(Q)$ gravity
• Cosmic acceleration and energy conditions in $\Lambda$CDM symmetric teleparallel $f(Q)$ gravity
• Late-time acceleration in $f\left(Q\right)$ gravity: Analysis and constraints in an anisotropic background
• Observational constraints on a logarithmic scalar field dark energy model and black hole mass evolution in the Universe
• A New Equation of State for Dark Energy Model
• A New Class of Parametrization for Dark Energy without Divergence
• Oscillations in the dark energy EoS: new MCMC lessons
• Accelerating Universe scenario in anisotropic $f\left(Q\right)$ cosmology
• Model independent constraints on the cosmological expansion rate
• Revisiting the parametrization of Equation of State of Dark Energy via SNIa Data
• Stability analysis of anisotropic Bianchi type-I cosmological model in teleparallel gravity
• Constraining the anisotropy of the Universe via Pantheon supernovae sample