ar X iv : a st ro - p h / 95 07 02 0 v 1 6 J ul 1 99 5 Getting the Measure of the Flatness Problem

ar X iv : a st ro - p h / 98 07 09 0 v 1 9 J ul 1 99 8 1 MACROSCOPIC PROCESSES IN THE SOLAR INTERIOR

With the

ar X iv : a st ro - p h / 94 07 02 4 v 1 7 J ul 1 99 4 BARYONIC DARK MATTER

" La theorie c'est bien, mais ca n'empeche pas d'exister. " Emile Charcot Abstract In the first two of these lectures, I present the evidence for baryonic dark matter and describe possible forms that it may take. The final lecture discusses formation of baryonic dark matter, and sets the cosmological context.

ar X iv : a st ro - p h / 95 06 06 0 v 1 8 J un 1 99 5 The Physics of Core - Collapse Supernova Explosions a

ar X iv : a st ro - p h / 95 05 14 5 v 1 3 1 M ay 1 99 5 Search for GRB counterparts

ar X iv : a st ro - p h / 95 12 02 8 v 1 6 D ec 1 99 5 A search for distant X - ray galaxy clusters

We report on the progress of our search for serendipitous distant X-ray galaxy clusters in the ROSAT PSPC pointed observations archive. The initial aim of our work is to measure the X-ray luminosity function of clusters down to f lim = 4×10 −14 erg cm −2 s −1 and so test the claims of cluster evolution at moderate redshifts. We have R band images and spectroscopy for 45 extended sources detecte...