# Dark energy constraints from the cosmic age and supernova

@article{Feng2005DarkEC, title={Dark energy constraints from the cosmic age and supernova}, author={Bo Feng and Xiulian Wang and Xinmin Zhang}, journal={Physics Letters B}, year={2005}, volume={607}, pages={35-41} }

Using the low limit of cosmic ages from globular cluster and the white dwarfs: t(0) > 12 Gyr, together with recent new high redshift supernova observations from the HST/GOODS program and previous supernova data, we give a considerable estimation of the equation of state for dark energy, with uniform priors as weak as 0.2 < Omega(m) < 0.4 or 0.1 < Omega(m)h(2) < 0.16. We find cosmic age limit plays a significant role in lowering the upper bound on the variation amplitude of dark energy equation… Expand

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#### References

SHOWING 1-10 OF 41 REFERENCES

Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant

- Physics
- 1998

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… Expand

OBSERVATIONAL EVIDENCE FROM SUPERNOVAE FOR AN ACCELERATING UNIVERSE AND A COSMOLOGICAL CONSTANT

- Physics
- 1998

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… Expand

Implications of the WMAP Age Measurement for Stellar Evolution and Dark Energy

- Physics
- 2003

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… Expand

A theoretician's analysis of the supernova data and the limitations in determining the nature of dark energy

- Mathematics, Physics
- 2003

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… Expand

Determining the equation of state of dark energy from angular size of compact radio sources and X-ray gas mass fraction of galaxy clusters

- Physics
- 2004

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.… Expand

Cosmological Results from High-z Supernovae* **

- Physics
- 2003

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,… Expand

Measurements of $\Omega$ and $\Lambda$ from 42 high redshift supernovae

- Physics
- 1998

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… Expand

Model-independent Constraints on Dark Energy Density from Flux-averaging Analysis of Type Ia Supernova Data

- Physics
- 2004

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… Expand

Reconstructing the cosmic equation of state from supernova distances.

- Physics, Medicine
- Physical review letters
- 2000

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). Expand

Flux-averaging analysis of type ia supernova data

- Physics
- 1999

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… Expand