19 1 v 1 1 1 Ja n 20 00 Clustering in the X - ray

ar X iv : a st ro - p h / 00 01 17 6 v 1 1 1 Ja n 20 00 X - rays and Cosmology

The role of X-ray observations for cosmological studies and conclusions is briefly explored. X-rays currently yield cosmologically interesting results on the abundances, evolution and gas content of clusters of galaxies, on the clustering and evolution of active galaxies and on the X-ray Background. They are unlikely in the long term future to give the most precise values of the cosmologi-cal p...

ar X iv : 0 80 1 . 25 00 v 1 [ co nd - m at . o th er ] 1 6 Ja n 20 08 Making , probing and understanding ultracold Fermi

ar X iv : a st ro - p h / 00 01 17 8 v 1 1 1 Ja n 20 00 THE ENERGY OUTPUT OF THE UNIVERSE

The total energy emitted by the growth of massive black holes is large and can be 10-50 per cent of that emitted by stars in the universe. I show how the X-ray Background provides a good measure of this energy and also why most accretion power is absorbed and re-emitted in the far infrared band. A model for the obscured growth of massive black holes is presented which accounts for both the high...

ar X iv : g r - qc / 0 00 10 28 v 1 1 1 Ja n 20 00 Finite Temperature Field Theory of “ Extreme Black Holes ”

We treat the model which describes “extreme black holes” moving slowly. We derive an effective lagrangian in the low energy for this model and then investigate a statistical behavior of “extreme black holes” in the finite temperature.

ar X iv : m at h - ph / 0 30 10 19 v 1 1 5 Ja n 20 03 Which distributions of matter diffract ? — Some answers