ar X iv : a st ro - p h / 98 07 06 8 v 1 7 J ul 1 99 8 Recovery of the Shape of the Mass Power Spectrum from the Lyman - alpha Forest

ar X iv : a st ro - p h / 98 07 06 8 v 2 9 J ul 1 99 8 Recovery of the Shape of the Mass Power Spectrum from the Lyman - alpha Forest

We propose a method for recovering the shape of the mass power spectrum on large scales from the transmission fluctuations of the Lyman-alpha forest, which takes into account directly redshift-space distortions. The procedure, in discretized form, involves the inversion of a triangular matrix which projects the mass power spectrum in 3-D real-space to the transmission power spectrum in 1-D reds...

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 / 98 12 16 7 v 1 9 D ec 1 99 8 LYMAN BREAK GALAXIES AT z ∼ 3 AND BEYOND

We report on the status of large surveys of photometrically selected star forming galaxies at z ∼ 3 and z ∼ 4, with particular emphasis on both the advantages and the limitations of selecting objects using the “Lyman break” technique. Current results on the luminosity functions, luminosity densities, color distribution, star formation rates, clustering properties, and the differential evolution...

ar X iv : a st ro - p h / 98 11 19 7 v 1 1 2 N ov 1 99 8 The ‘ bare ’ strange stars might not be bare

ar X iv : a st ro - p h / 98 06 04 8 v 1 3 J un 1 99 8 MERLIN observations of GRS 1915 + 105 : a progress report

Abstract We present a progress report on MERLIN radio imaging of a radio outburst from GRS 1915+105. The major ejection occurred at the end of a ∼ 20 day ‘plateau’ state, characterised by low/hard X-ray fluxes and a relatively strong flat-spectrum radio component. Apparent superluminal motions have been mapped with unprecedented resolution, and imply higher velocities in the jet than previously...