Observation of Cosmological Time Dilation Using Type Ia Supernovae as Clocks

OBSERVATION OF COSMOLOGICAL TIME DILATION USING TYPE IA SUPERNOVAE AS CLOCKS The Supernova Cosmology Project : III

OBSERVATION OF COSMOLOGICAL TIME DILATIONUSING TYPE IA SUPERNOVAE AS CLOCKS The Supernova Cosmology Project III G GOLDHABER S DEUSTUA S GABI D GROOM I HOOK

This work is based on the rst results from a systematic search for high redshift Type Ia supernovae Using lters in the R band we dis covered seven such SNe with redshift z before or at maximum light Type Ia SNe are known to be a homogeneous group of SNe to rst order with very similar light curves spectra and peak luminosities In this Presented by G Goldhaber e mail address gerson LBL gov Curren...

The type Ia supernovae and the Hubble’s constant

The Hubble’s constant is usually surmised to be a constant; but the experiments show a large spread and conflicting estimates. According to the plasma-redshift theory, the Hubble’s constant varies with the plasma densities along the line of sight. It varies then slightly with the direction and the distance to a supernova and a galaxy. The relation between the magnitudes of type Ia supernovae an...

Constraint on Cosmological Model with Matter Creation Using Type Ia Supernovae and Gamma-ray Bursts Observations

Using a collection of 12 γ-ray burst (GRBs) sample and 186 Type Ia supernovae (SNe Ia) data containing 157 gold and 29 silver set, we make constraints on the cosmological model with adiabatic matter creation, assuming a spatially flat universe. It is shown that the matter creation can also lead to accelerating expansion of the universe without a cosmological constant or any other dark energy co...

On the nature of cosmological time

Time is a parameter playing a central role in our most fundamental modeling of natural laws. Relativity theory shows that the comparison of times measured by different clocks depends on their relative motions and on the strength of the gravitational field in which they are embedded. In standard cosmology, the time parameter is the one measured by fundamental clocks, i.e. clocks at rest with res...