ar X iv : a st ro - p h / 03 11 59 5 v 1 2 6 N ov 2 00 3 WHAT ARE S 0 ( 0 ) GALAXIES ?

ar X iv : a st ro - p h / 03 11 60 3 v 1 2 7 N ov 2 00 3 A search for emission line galaxies at z = 6 . 5

We are carrying out a search for Lyα emitting galaxies at z = 6.5 employing slitless spectroscopy at the VLT. In our 43 arcmin field we find three isolated single emission lines with SEDs consistent with line emitting galaxies at z = 6.5.

ar X iv : a st ro - p h / 06 11 09 9 v 1 2 N ov 2 00 6 Nuclear Activity in UZC Compact Groups of Galaxies

ar X iv : a st ro - p h / 03 11 44 5 v 1 1 9 N ov 2 00 3 Multiscale self - organized criticality and powerful X - ray flares

A combination of spectral and moments analysis of the continuous X-ray flux data is used to show consistency of statistical properties of the powerful solar flares with 2D BTW prototype model of self-organized criticality.

ar X iv : a st ro - p h / 04 11 65 0 v 1 2 3 N ov 2 00 4 Clusters of Galaxies : New Results from the CLEF Hydrodynamics Simulation

Preliminary results are presented from the CLEF hydrodynamics simulation, a large (N = 2 × 428 3 particles within a 200 h −1 Mpc comoving box) simulation of the ΛCDM cosmology that includes both radiative cooling and a simple model for galac-tic feedback. Specifically, we focus on the X-ray properties of the simulated clusters at z = 0 and demonstrate a reasonable level of agreement between sim...

ar X iv : a st ro - p h / 02 11 45 7 v 1 2 0 N ov 2 00 2 Time variation of fundamental constants : two phenomenological models

Time variation of fundamental constants, a strong signal of new physics, is analyzed comparing extant data with two phenomenological models. Results are discussed.