ar X iv : a st ro - p h / 01 03 44 4 v 1 2 7 M ar 2 00 1 From Centimeter to Millimeter Wavelengths : A High Angular Resolution Study of 3 C 273

ar X iv : a st ro - p h / 01 03 25 4 v 1 1 6 M ar 2 00 1 Construction of the Variability → Luminosity Estimator

ar X iv : a st ro - p h / 03 02 06 2 v 1 4 F eb 2 00 3 Variability of Sagittarius A * - Flares at 1 Millimeter

We report the results from recent observations of Sgr A* at short-/submillimeter wavelengths made with the partially finished Sub-Millimeter Array (SMA) on Mauna Kea. A total of 25 epochs of observations were carried out over the past 15 months in 2001 March to 2002 May. Noticeable variations in flux density at 1.3 mm were observed showing three “flares”. The SMA observations suggest that Sgr A...

ar X iv : a st ro - p h / 03 02 06 2 v 2 6 F eb 2 00 3 Variability of Sagittarius A * - Flares at 1 Millimeter

We report the results from recent observations of Sgr A* at short-/submillimeter wavelengths made with the partially finished Sub-Millimeter Array (SMA) on Mauna Kea. A total of 25 epochs of observations were carried out over the past 15 months in 2001 March to 2002 May. Noticeable variations in flux density at 1.3 mm were observed showing three “flares”. The SMA observations suggest that Sgr A...

ar X iv : a st ro - p h / 01 03 17 3 v 1 1 2 M ar 2 00 1 SIGNALS OF PRIMORDIAL PHASE TRANSITIONS ON CMB MAPS

The analysis of the CMB anisotropies is a rich source of cosmological informations. In our study, we simulated the signals produced by the relics of a first order phase transition occured during an inflationary epoch in the early Universe. These relics are bubbles of true vacuum that leave a characteristic non-Gaussian imprint on the CMB. We use different statistical estimators in order to eval...

ar X iv : a st ro - p h / 01 03 13 7 8 M ar 2 00 1 Primordial black holes and the Asymmetrical Distribution of Short GRB Events

We review some of the expectations for Primordial Black Hole evaporation and we review the properties of short Gamma Ray Bursts. It is plausible that these GRB come from PBH evaporation. We then show that the angular distribution asymmetry recently observed by us could be due to a concentration of PBH in the Galactic Arms like the Orion arm.