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 ?

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 ?

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 critically examine the cumulative effects of spacetime fluctuations over a huge distance. Unfortunately , our ana...

ar X iv : a st ro - p h / 05 02 36 3 v 3 2 7 M ay 2 00 5 Microlensing optical depth toward the Galactic Bulge using bright sources from OGLE - II

We present a measurement of the microlensing optical depth toward the Galactic Bulge based on 4 years of OGLE-II survey. We consider only bright sources in the extended Red Clump Giant (RCG) region of the Color-Magnitude

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 / 05 02 36 3 v 2 1 9 M ay 2 00 5 Microlensing optical depth toward the Galactic Bulge using bright sources from OGLE - II

We present a measurement of the microlensing optical depth toward the Galactic Bulge based on 4 years of OGLE-II survey. We consider only bright sources in the extended Red Clump Giant (RCG) region of the Color-Magnitude

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...