$Om$ diagnostic applied to scalar field models and slowing down of cosmic acceleration

Abstract

We apply the $Om$ diagnostic to models for dark energy based on scalar fields. In case of the power law potentials, we demonstrate the possibility of slowing down the expansion of the Universe around the present epoch for a specific range in the parameter space. For these models, we also examine the issues concerning the age of Universe. We use the $Om$ diagnostic to distinguish the $\Lambda$CDM model from non minimally coupled scalar field, phantom field and generic quintessence models. Our study shows that the $Om$ has zero, positive and negative curvatures for $\Lambda$CDM, phantom and quintessence models respectively. We use an integrated data base (SN+Hubble+BAO+CMB) for bservational analysis and demonstrate that $Om$ is a useful diagnostic to apply to observational data.

arXiv comment13 pages, Latex style, 11 figures, 5 tables, Accepted for publication in MNRAS

References in corpus (63)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Planck 2013 results. XVI. Cosmological parameters
• Dynamics of dark energy
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• 4D Gravity on a Brane in 5D Minkowski Space
• The Case for a Positive Cosmological Lambda-term
• The 6dF Galaxy Survey: Baryon Acoustic Oscillations and the Local Hubble Constant
• Phantom Energy and Cosmic Doomsday
• Dark Energy and the Accelerating Universe
• Baryon Acoustic Oscillations in the Sloan Digital Sky Survey Data Release 7 Galaxy Sample
• The Hubble Space Telescope Cluster Supernova Survey: V. Improving the Dark Energy Constraints Above z>1 and Building an Early-Type-Hosted Supernova Sample
• Statefinder -- a new geometrical diagnostic of dark energy
• Constraints on the redshift dependence of the dark energy potential
• Cosmic Chronometers: Constraining the Equation of State of Dark Energy. I: H(z) Measurements
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Sky Maps, Systematic Errors, and Basic Results
• The WiggleZ Dark Energy Survey: mapping the distance-redshift relation with baryon acoustic oscillations
• The WiggleZ Dark Energy Survey: Joint measurements of the expansion and growth history at z < 1
• Exploring the Expanding Universe and Dark Energy using the Statefinder Diagnostic
• Reconstruction of a scalar-tensor theory of gravity in an accelerating universe
• Braneworld models of dark energy
• Two new diagnostics of dark energy
• Baryon Acoustic Oscillations in the Ly-α forest of BOSS quasars
• A New Cosmological Model of Quintessence and Dark Matter
• Cosmological Dynamics of Phantom Field
• Hubble parameter measurement constraints on the cosmological deceleration-acceleration transition redshift
• Modeling the Anisotropic Two-Point Galaxy Correlation Function on Small Scales and Improved Measurements of H(z), D_A(z), and f(z)sigma_8(z) from the Sloan Digital Sky Survey DR7 Luminous Red Galaxies
• New constraints on cosmological parameters and neutrino properties using the expansion rate of the Universe to z~1.75
• Model independent evidence for dark energy evolution from Baryon Acoustic Oscillations
• From cosmic deceleration to acceleration: new constraints from SN Ia and BAO/CMB
• Interacting Holographic Phantom
• Cosmology With Negative Potentials
• Is cosmic acceleration slowing down?
• Galileon gravity and its relevance to late time cosmic acceleration
• Exploring Cosmological Expansion Parametrizations with the Gold SnIa Dataset
• A litmus test for Lambda
• Cosmological dynamics of non-minimally coupled scalar field system and its late time cosmic relevance
• Modified gravity a la Galileon: Late time cosmic acceleration and observational constraints
• Supergravity, Dark Energy and the Fate of the Universe
• Dynamical features of scalar-torsion theories
• Can dark energy be decaying?
• The Statefinder hierarchy: An extended null diagnostic for concordance cosmology
• A new null diagnostic customized for reconstructing the properties of dark energy from BAO data
• The Fate of Dark Energy
• Constraints on cosmological parameters in power-law cosmology
• Integrable cosmological models with non-minimally coupled scalar fields
• Statefinder hierarchy of bimetric and galileon models for concordance cosmology
• Statefinder Analysis of f(T) Cosmology
• Dark Energy and the Fate of the Universe
• Global stability analysis for cosmological models with non-minimally coupled scalar fields
• Reconstruction of Scalar Potentials in Modified Gravity Models
• Observational constraints on non-minimally coupled Galileon model
• Cosmology with non-minimal derivative couplings: perturbation analysis and observational constraints
• Cosmic Mimicry: Is LCDM a Braneworld in Disguise ?
• Diagnosing holographic dark energy models with statefinder hierarchy
• Non-minimally Coupled Cosmological Models with the Higgs-like Potentials and Negative Cosmological Constant
• Discriminating dark energy models by using the statefinder hierarchy and the growth rate of matter perturbations
• Cosmic Acceleration and Modified Gravity
• Viscous Modified Gravity on a RS Brane Embedded in AdS5
• Cosmological dynamics of a non-minimally coupled bulk scalar field in DGP setup
• Late time cosmic acceleration: ABCD of dark energy and modified theories of gravity

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• $f(Q,T)$ gravity models with observational constraints
• Dark energy models from a parametrization of $H$: A comprehensive analysis and observational constraints
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• Dynamics of interacting quintessence
• Barrow HDE model for Statefinder diagnostic in FLRW Universe
• Existence of bulk viscous universe in $f(R,T)$ gravity and confrontation with observational data
• Accelerating Universe in Hybrid and Logarithmic Teleparallel Gravity
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• $f(R,T)=f(R)+\lambda T$ gravity models as alternatives to cosmic acceleration
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• An Axially Symmetric Transitioning models with Observational Constraints
• Transitioning Universe with hybrid scalar field in Bianchi I space-time
• A New $Om(z)$ Diagnostic of Dark Energy in General Relativity Theory
• Data Analysis of three parameter models of deceleration parameter in FRW Universe
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• Cosmological reconstruction and {\it Om} diagnostic analysis of Einstein-Aether Theory
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• Cosmic acceleration from coupling of baryonic and dark matter components: Analysis and diagnostics
• Observation constraints on scalar field cosmological model in Anisotropic universe
• Revisiting cosmic acceleration with DESI BAO
• A study of interacting scalar field model from the perspective of the dynamical systems theory
• Late-time acceleration with steep exponential potentials
• Resolving FLRW cosmology through effective equations of state in $f(T)$ gravity
• Do current observations support transient acceleration of our universe?
• Interacting and Non-interacting Reńyi Holographic Dark Energy Models in DGP Braneworld
• Diagnostic Approaches for Interacting generalized holographic Ricci Dark Energy Models
• Observational constraints in late time for an axially symmetric transitioning model with bulk viscous fluid
• ParamANN: A Neural Network to Estimate Cosmological Parameters for $\Lambda$CDM Universe Using Hubble Measurements
• Galileon versus Quintessence: A comparative phase space analysis and late-time cosmic relevance
• Generic autonomous system approach to interacting dark energy models