ar X iv : a st ro - p h / 97 11 05 8 v 1 6 N ov 1 99 7 WFPC 2 Observations of NGC 454 : an Interacting Pair of Galaxies

ar X iv : a st ro - p h / 97 11 18 2 v 1 1 7 N ov 1 99 7 Warps and Secondary

Secondary infall in galaxies could cause the angular momentum of the outer halo to change its orientation. The generation of warps due to this effect is studied using N-body simulations.

ar X iv : a st ro - p h / 97 11 24 4 v 1 2 0 N ov 1 99 7 POPULATION SYNTHESIS OF HIGH ENERGY TRANSIENTS RELATIVISTIC BINARY MERGING RATES

ar X iv : a st ro - p h / 97 11 13 5 v 1 1 2 N ov 1 99 7 HOT ELECTRONS AND COLD PHOTONS : GALAXY CLUSTERS AND THE SUNYAEV - ZEL ’ DOVICH EFFECT

ar X iv : a st ro - p h / 99 11 47 7 v 1 2 6 N ov 1 99 9 Galaxies at z > 5 : The View from Hawaii

We review the properties of z > 5 galaxies studied with HST and with the Keck telescopes, and discuss the detectability of Lyα emission-line galaxies out to z ∼ 6.5 based on these data and ongoing narrowband imaging surveys. The brightest sources may show (R − Z) color breaks, although the high sky background at Z (λeff ≈ 9200 Å), makes such observations challenging for typical faint sources. K...

ar X iv : a st ro - p h / 98 11 41 8 v 1 2 6 N ov 1 99 8 Astrophysics on the GRAPE Family of Special Purpose Computers Piet Hut Institute for Advanced Study

The GRAPE-4, the world's fastest computer in 1995-1997, has produced some major scientific results, through a wide diversity of large-scale simulations in astrophysics. Applications have ranged from planetary formation, through the evolution of star clusters and galactic nuclei, to the formation of galaxies and clusters of galaxies.