Quintessence reconstructed : New constraints and tracker viability

@article{Sahlen2007QuintessenceR,
  title={Quintessence reconstructed : New constraints and tracker viability},
  author={Martin Sahl'en and Andrew R. Liddle and David Parkinson},
  journal={Physical Review D},
  year={2007},
  volume={75},
  pages={023502}
}
We update and extend our previous work reconstructing the potential of a quintessence field from current observational data. We extend the cosmological data set to include new supernova data, plus information from the cosmic microwave background and from baryon acoustic oscillations. We extend the modeling by considering Pade approximant expansions as well as Taylor series, and by using observations to assess the viability of the tracker hypothesis. We find that parameter constraints have… 
New general parametrization of quintessence fields and its observational constraints
We present a new parameterization of quintessence potentials for dark energy based directly upon the dynamical properties of the equations of motion. Such parameterization arises naturally once the
Observational constraints on quintessence models of dark energy
Scalar fields aptly describe equation of state of dark energy. The scalar field models were initially proposed to circumvent the fine tuning problem of cosmological constant. However, the model
Observational Constraints on Quintessence: Thawing, Tracker, and Scaling models
For two types of quintessence models having thawing and tracking properties, there exist analytic solutions for the dark energy equation of state $w$ expressed in terms of several free parameters. We
The ΛCDM Model in the Lead—A Bayesian Cosmological Model Comparison
Recent astronomical observations indicate that our universe is undergoing a period of accelerated expansion. While there are many cosmological models that explain this phenomenon, the main question
Consistency Test of Dark Energy Models
TLDR
This paper takes the more recent SN Ia, CMB and BAO data, invoke the same parametrization of the dark energy equation of state, and applies this method of consistency test to five dark energy models, including the ΛCDM model, the generalized Chaplygin gas, and three quintessence models: exponential, power-law and inverse-exponential potentials.
Falsifying Paradigms for Cosmic Acceleration
Consistency relations between growth of structure and expansion history observables exist for any physical explanation of cosmic acceleration. We perform MCMC likelihood exploration of these
A reconstruction of quintessence dark energy
With a parametric form of the equation of state parameter of dark energy, a quintessence potential has been reconstructed. The potential is found to be a generalization of a double exponential
Non-parametric reconstruction of the cosmological jerk parameter
The cosmological jerk parameter j is reconstructed in a non-parametric way from observational data independent of a fiducial cosmological model. The Cosmic Chronometer data as well as the Supernovae
Consistency Test and Constraint of Quintessence
In this paper we highlight our recent work in arXiv:0803.4504. In that work, we proposed a new consistency test of quintessence models for dark energy. Our test gave a simple and direct signature if
...
...

References

SHOWING 1-10 OF 215 REFERENCES
Probing quintessence: reconstruction and parameter estimation from supernovae
We explore the prospects for using future supernova observations to probe the dark energy. We focus on quintessence, an evolving scalar field that has been suggested as a candidate for the dark
Direct reconstruction of the quintessence potential
We describe an algorithm which directly determines the quintessence potential from observational data, without using an equation of state parametrization. The strategy is to numerically determine
Genesis of cosmological tracker fields
The role of the quintessence field as a probable candidate for the repulsive dark energy, the conditions for tracking and the requisites for tracker fields are examined. The concept of `integrated
MICROWAVE BACKGROUND CONSTRAINTS ON COSMOLOGICAL PARAMETERS
We use a high-accuracy computational code to investigate the precision with which cosmological parameters could be reconstructed by future cosmic microwave background experiments. We focus on the two
Cosmological parameters from CMB and other data: A Monte Carlo approach
We present a fast Markov chain Monte Carlo exploration of cosmological parameter space. We perform a joint analysis of results from recent cosmic microwave background ~CMB! experiments and provide
Reconstructing the cosmic equation of state from supernova distances.
TLDR
A model-independent method for estimating the form of the potential V(phi) of the scalar field driving this acceleration, and the associated equation of state w(phi), based on a versatile analytical form for the luminosity distance D(L).
Tracker fields from nonminimally coupled theory
We extend the concept of quintessence to a flat nonminimally coupled scalar - tensor theories of gravity. By means of Noether's symmetries for the cosmological pointlike Lagrangian L, it is possible
Observing dark energy dynamics with supernova, microwave background and galaxy clustering
Observing dark energy dynamics is the most important aspect of the current dark energy research. In this paper we perform a global analysis of the constraints on the property of dark energy from the
Present and future evidence for evolving dark energy
We compute the Bayesian evidences for one- and two-parameter models of evolving dark energy, and compare them to the evidence for a cosmological constant, using current data from Type Ia supernova,
...
...