arXiv subjects

R A E Fosbury

Publications and source records attributed to R A E Fosbury.

2 recordsLinked to original sources

arXiv1998

The structure and composition of high redshift radio galaxies

Keck spectropolarimetry, giving spectral coverage from Ly-$α$ to beyond CIII], and HST imaging of a sample of powerful radio galaxies with $z\sim2.5$\ has been obtained. These data are giving us a clear picture of the nature of the `alignment effect' and are revealing new correlations between polarization and emission line ratios which may be interpreted in the context of the stellar evolutionary histories of these massive galaxies. In particular, we see the 2200Ådust absorption feature in the radio galaxy continua and a large variation in the NV/CIV line ratio amongst objects having a similar ionization level. VLT infrared spectroscopy of this and similar samples will give us a view of a period of galaxy history during which rapid chemical evolution was taking place.

astro-ph↗

arXiv1996

The future of HST and the planning for a Next Generation Space Telescope

After the success of the refurbishment mission to HST in December 1993, the telescope has taken its place at the very leading edge of astrophysical research. The breadth and depth of the topics covered at the HST conference in Paris in December 1995 gave us a foretaste of the value of the data archive being accumulated and the supreme importance of future observations for guiding and enriching the programmes carried out with Keck and the very large groundbased telescopes nearing completion. This talk will outline, as far as we know them, the plans for HST beyond the 1997 and 1999 servicing missions. The current planning for a Next Generation Space Telescope as part of NASAs 'Origins' initiative will be described with particular emphasis on possibilities for European participation.

astro-ph↗