Dark energy constraints from the cosmic age and supernova

  title={Dark energy constraints from the cosmic age and supernova},
  author={Bo Feng and Xiulian Wang and Xinmin Zhang},
  journal={Physics Letters B},
Age constraints on the cosmic equation of state
Dark energy is the invisible fuel that seems to drive the current acceleration of the Universe. Its presence, which is inferred from an impressive convergence of high-quality observational results
Early dark energy at high redshifts: status and perspectives
Early dark energy models, for which the contribution to the dark energy density at high redshifts is not negligible, influence the growth of cosmic structures and could leave observable signatures
Constraining dynamical dark energy models through the abundance of high-redshift supermassive black holes
We compute the number density of massive Black Holes (BHs) at the centre of galaxies at z = 6 in di! erent Dynamical Dark Energy (DDE) cosmologies, and compare it with existing observational lower
Dark energy evolution and the curvature of the universe from recent observations
We discuss the constraints on the time-varying equation of state for dark energy and the curvature of the universe using observations of type Ia supernovae from Riess et al. and the most recent
Probing dark energy dynamics from current and future cosmological observations
We report the constraints on the dark energy equation-of-state w(z) using the latest “Constitution” SNe sample combined with the WMAP5 and Sloan Digital Sky Survey data. Assuming a flat Universe, and
Dynamical dark energy in light of the latest observations
A flat Friedmann–Robertson–Walker universe dominated by a cosmological constant (Λ) and cold dark matter (CDM) has been the working model preferred by cosmologists since the discovery of cosmic
Reconstruction of the Dark Energy Equation of State from the Latest Observations
Since the discovery of the accelerating expansion of our universe in 1998, studying the features of dark energy has remained a hot topic in modern cosmology. In the literature, dark energy is usually
New Limits on Coupled Dark Energy from Planck
Recently, the Planck collaboration has released the first cosmological papers providing the high resolution, full sky, maps of the cosmic microwave background (CMB) temperature anisotropies. It is
Examining the evidence for dynamical dark energy.
Estimates of the Bayesian evidence show little preference between the cosmological constant model and the dynamical model for a range of correlated prior choices, and it is found that the best fit models for current data could be well distinguished from the ΛCDM model by observations such as Planck and Euclid-like surveys.


Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
We present spectral and photometric observations of 10 Type Ia supernovae (SNe Ia) in the redshift range 0.16 " z " 0.62. The luminosity distances of these objects are determined by methods that
We present spectral and photometric observations of 10 Type Ia supernovae (SNe Ia) in the redshift range 0.16 " z " 0.62. The luminosity distances of these objects are determined by methods that
Implications of the WMAP Age Measurement for Stellar Evolution and Dark Energy
The WMAP satellite has provided a new measurement of the age of the Universe, of $13.7 \pm 0.2$ Gyr. A comparison of this limit with constraints from stellar evolution imply that the oldest globular
A theoretician's analysis of the supernova data and the limitations in determining the nature of dark energy
Current cosmological observations show a strong signature of the existence of a dark energy component with negative pressure. The most obvious candidate for this dark energy is the cosmological
Determining the equation of state of dark energy from angular size of compact radio sources and X-ray gas mass fraction of galaxy clusters
Using recent measurements of angular size of high-z milliarcsecond compact radio sources compiled by Gurvits et al. (1999) and X-ray gas mass fraction of galaxy clusters published by Allen et al.
Cosmological Results from High-z Supernovae* **
The High-z Supernova Search Team has discovered and observed eight new supernovae in the redshift interval z = 0.3-1.2. These independent observations, analyzed by similar but distinct methods,
Measurements of $\Omega$ and $\Lambda$ from 42 high redshift supernovae
We report measurements of the mass density, Omega_M, and cosmological-constant energy density, Omega_Lambda, of the universe based on the analysis of 42 Type Ia supernovae discovered by the Supernova
Model-independent Constraints on Dark Energy Density from Flux-averaging Analysis of Type Ia Supernova Data
We reconstruct the dark energy density X(z) as a free function from current Type Ia supernova (SN Ia) data, together with the cosmic microwave background (CMB) shift parameter from CMB data from the
Reconstructing the cosmic equation of state from supernova distances.
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).
Flux-averaging analysis of type ia supernova data
Because of flux conservation, flux-averaging justifies the use of the distance-redshift relation for a smooth universe in the analysis of Type Ia supernova (SN Ia) data. We have combined the SN Ia