ar X iv : a st ro - p h / 03 02 37 2 v 2 2 1 M ar 2 00 3 Probing Planck - scale physics with Extragalactic Sources ?

ar X iv : a st ro - p h / 03 02 37 2 v 3 2 6 M ay 2 00 3 Probing Planck - scale physics with Extragalactic Sources ?

At Planck-scale, spacetime is " foamy " due to quantum fluctuations predicted by quantum gravity. Here we consider the possibility of using spacetime foam-induced phase incoherence of light from distant galaxies and gamma-ray bursters to probe Planck-scale physics. In particular, we examine the cumulative effects of spacetime fluctuations over a huge distance. Our analysis shows that they are f...

ar X iv : a st ro - p h / 02 04 03 6 v 1 2 A pr 2 00 2 Investigating the Flame Microstructure in Type

ar X iv : a st ro - p h / 02 10 03 4 v 1 1 O ct 2 00 2 MISSING PARAMETERS IN THE CMB PHYSICS

The lecture is devoted to the comparison of a few models of cosmic recombination kinetics with recent CMB anisotropy data and to corresponding predictions for the upcoming Planck mission. The influence of additional sources of ionized photons at the epoch of hydrogen recombination may restrict our possibility to estimate the density of baryonic fraction of matter when using Planck data. This ne...

ar X iv : a st ro - p h / 02 03 25 3 v 1 1 5 M ar 2 00 2 Retroactive Coherence

In gravitational microlensing, interference visibility is established when the spectral resolution of the observation is less than the reciprocal of the time delay difference. Using high resolution spectroscopy fringes will be visible at large path differences, even when the source emission is incoherent. This is possible because coherence can be established after interference has already occur...

ar X iv : a st ro - p h / 04 03 02 4 v 1 1 M ar 2 00 4 On coordinate distances to type Ia supernovae and radio galaxies

Quantum model of homogeneous and isotropic universe predicts logarithmic-law dependence of coordinate distance to source on redshift z which is in good agreement with type Ia supernovae and radio galaxies observations for the redshift range z = 0.01 − 1.8. Comparison with phenomenological models with dark energy in the form of cosmological constant and without dark energy component is made. Flu...