The Logotropic Dark Fluid: Observational and Thermodynamic Constraints

Abstract

We have considered a spatially flat, homogeneous and isotropic FLRW Universe filled with a single fluid, known as logotropic dark fluid (LDF), whose pressure evolves through a logarithmic equation of state. We use the recent Pantheon SNIa and cosmic chronometer datasets to constrain the parameters of this model, the present fraction of dark matter ${\Omega }_{m0}$ and the Hubble constant $H_0$. We find that the mean values of these parameters are ${\Omega }_{m0}=0.288\pm 0.012$ and $H_0=69.652\pm 1.698km/s/Mpc$ at the $1\sigma$ CL. We also find that the LDF model shows a smooth transition from the deceleration phase to acceleration phase of the universe in the recent past. We notice that the redshift of this transition $z_t=0.706\pm 0.048$ ($1\sigma$ error) and is well consistent with the present observations. Interestingly, we find that the Universe will settle down to a $\Lambda$CDM model in future and there will not be any future singularity in the LDF model. Furthermore, we notice that there is no significant difference between the LDF and $\Lambda$CDM models at the present epoch, but the difference (at the percent level) between these models is found as the redshift increases. We have also studied the generalized second law of thermodynamics at the dynamical apparent horizon for the LDF model with the Bekenstein and Viaggiu entropies.

arXiv commentv2: 11 pages, 5 figures, new material and references added, Accepted for publication in IJMPD

References in corpus (70)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Planck 2015 results. XIII. Cosmological parameters
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• The Structure of Cold Dark Matter Halos
• Planck 2013 results. XVI. Cosmological parameters
• Dynamics of dark energy
• The Cosmological Constant and Dark Energy
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• Cosmological parameters from SDSS and WMAP
• The Case for a Positive Cosmological Lambda-term
• The Complete Light-curve Sample of Spectroscopically Confirmed Type Ia Supernovae from Pan-STARRS1 and Cosmological Constraints from The Combined Pantheon Sample
• Thermodynamics of Spacetime: The Einstein Equation of State
• An alternative to quintessence
• A Flat Universe from High-Resolution Maps of the Cosmic Microwave Background Radiation
• Generalized Chaplygin Gas, Accelerated Expansion and Dark Energy-Matter Unification
• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• BICEP2 I: Detection Of B-mode Polarization at Degree Angular Scales
• The Structure of Dark Matter Haloes in Dwarf Galaxies
• Constraints on the redshift dependence of the dark energy potential
• A 6% measurement of the Hubble parameter at $z\sim 0.45$: direct evidence of the epoch of cosmic re-acceleration
• H0LiCOW XIII. A 2.4% measurement of $H_0$ from lensed quasars: $5.3\sigma$ tension between early and late-Universe probes
• Cosmic Chronometers: Constraining the Equation of State of Dark Energy. I: H(z) Measurements
• Cosmological parameter analysis including SDSS Ly-alpha forest and galaxy bias: constraints on the primordial spectrum of fluctuations, neutrino mass, and dark energy
• Constraining Cosmological Parameters Based on Relative Galaxy Ages
• A Joint Analysis of BICEP2/Keck Array and Planck Data
• First Law of Thermodynamics and Friedmann Equations of Friedmann-Robertson-Walker Universe
• The trouble with $H_0$
• Unified first law of black-hole dynamics and relativistic thermodynamics
• Gravity and the Thermodynamics of Horizons
• Classical and Quantum Thermodynamics of horizons in spherically symmetric spacetimes
• A common mass scale for satellite galaxies of the Milky Way
• Can the Chaplygin gas be a plausible model for dark energy?
• SNLS3: Constraints on Dark Energy Combining the Supernova Legacy Survey Three Year Data with Other Probes
• Non-minimal dark sector physics and cosmological tensions
• A constant dark matter halo surface density in galaxies
• Hubble parameter measurement constraints on the cosmological deceleration-acceleration transition redshift
• Hubble parameter measurement constraints on the redshift of the deceleration-acceleration transition, dynamical dark energy, and space curvature
• A kinematical approach to dark energy studies
• Thermodynamics of an accelerated expanding universe
• The Revival of the Unified Dark Energy-Dark Matter Model ?
• Friedmann Equations and Thermodynamics of Apparent Horizons
• Cosmographic bounds on the cosmological deceleration-acceleration transition redshift in $f(\mathcal{R})$ gravity
• The Cardassian expansion revisited: constraints from updated Hubble parameter measurements and Type Ia Supernovae data
• Cosmological constraints in extended parameter space from the Planck 2018 Legacy release
• A parametric reconstruction of the deceleration parameter
• Using H(z) data as a probe of the concordance model
• Cosmokinetics: A joint analysis of Standard Candles, Rulers and Cosmic Clocks
• A divergence free parametrization of deceleration parameter for scalar field dark energy
• The Logotropic Dark Fluid as a unification of dark matter and dark energy
• Cosmic slowing down of acceleration for several dark energy parametrizations
• The local and distant Universe: stellar ages and $H_0$
• Constraints on reconstructed dark energy model from SN Ia and BAO/CMB observations
• Extended logotropic fluids as unified dark energy models
• Apparent horizon and gravitational thermodynamics of the Universe: Solutions to the temperature and entropy confusions, and extensions to modified gravity
• Considerations on the thermal equilibrium between matter and the cosmic horizon
• The Apparent Universe
• Cosmological model-independent test of $\Lambda$CDM with two-point diagnostic by the observational Hubble parameter data
• Comparison between the Logotropic and $\Lambda$CDM models at the cosmological scale
• Cosmic acceleration in non-canonical scalar field model - An interacting scenario
• Constraining Logotropic Unified Dark Energy Models
• A redefinition of Hawking temperature on the event horizon: Thermodynamical equilibrium
• Non-parametric reconstruction of dark energy and cosmic expansion from the Pantheon compilation of type Ia supernovae
• Utility of observational Hubble parameter data on dark energy evolution
• First law of thermodynamics for dynamical apparent horizons and the entropy of Friedmann universes
• Bekenstein-Hawking entropy in expanding universes from black hole theorems
• Do recent observations favor a cosmological event horizon: A thermodynamical prescription?
• Viaggiu entropy and the generalized second law in a flat FLRW Universe
• Dynamics of the Cosmological Apparent Horizon: Surface Gravity & Temperature

Cited by in corpus (7)

• On the evolution of the Hubble constant with the SNe Ia Pantheon Sample and Baryon Acoustic Oscillations: a feasibility study for GRB-cosmology in 2030
• Dynamics of an Interacting Barrow Holographic Dark Energy Model and its Thermodynamic Implications
• Testing generalized logotropic models with cosmic growth
• A new logotropic model based on a complex scalar field with a logarithmic potential
• Dynamical system analysis of logotropic dark fluid with a power law in the rest-mass energy density
• The Lambert $W$ equation of state in light of DESI BAO
• Unifying the Dark Sector with the New Generalized Chaplygin Gas: Observational Constraints