Observational constraints on tachyonic chameleon dark energy model
arXiv:1803.03297 · doi:10.1007/s10509-018-3285-2
Abstract
It has been recently shown that tachyonic chameleon model of dark energy in which tachyon scalar field non-minimally coupled to the matter admits stable scaling attractor solution that could give rise to the late-time accelerated expansion of the universe and hence alleviate the coincidence problem. In the present work, we use data from Type Ia supernova (SN Ia) and Baryon Acoustic Oscillations to place constraints on the model parameters. In our analysis we consider in general exponential and non-exponential forms for the non-minimal coupling function and tachyonic potential and show that the scenario is compatible with observations.
arXiv comment11 Pages, 12 figures
References in corpus (31)
- 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
- Dynamics of 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
- Cosmological parameters from CMB and other data: a Monte-Carlo approach
- Introduction to Modified Gravity and Gravitational Alternative for Dark Energy
- 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
- BICEP2 I: Detection Of B-mode Polarization at Degree Angular Scales
- Modified Gauss-Bonnet theory as gravitational alternative for dark energy
- Cosmological parameter analysis including SDSS Ly-alpha forest and galaxy bias: constraints on the primordial spectrum of fluctuations, neutrino mass, and dark energy
- The WiggleZ Dark Energy Survey: mapping the distance-redshift relation with baryon acoustic oscillations
- Detecting Dark Energy in Orbit -- the Cosmological Chameleon
- Cross-correlation Tomography: Measuring Dark Energy Evolution with Weak Lensing
- How to determine an effective potential for a variable cosmological term
- Super-acceleration as Signature of Dark Sector Interaction
- Constraints on linear-negative potentials in quintessence and phantom models from recent supernova data
- Brans-Dicke Scalar Field as a Chameleon
- Observational constraints on viable f(R) parametrizations with geometrical and dynamical probes
- Comparison of dark energy models: A perspective from the latest observational data
- Chameleon Field Theories
- Anomalous coupling of scalars to gauge fields
- Observational Constraints on Exponential Gravity
- Chameleon field and the late time acceleration of the universe
- On the Chameleon Brans-Dicke Cosmology
- Chameleonic Generalized Brans--Dicke model and late-time acceleration
- Evolution of the Chameleon Scalar Field in the Early Universe