ar X iv : a st ro - p h / 98 11 01 5 v 1 2 N ov 1 99 8 The large – scale distribution of galaxies in the Shapley Concentration

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.

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 11 07 8 v 2 6 N ov 1 99 8 Selection Effects at 21 cm

Surveys in the 21cm line of neutral hydrogen are testing the completeness of the catalogs of nearby galaxies. The remarkable observational fact is that the potential wells that confine gas to sufficient density that it can remain neutral in the face of ionizing radiation also provide sites for star formation, so that there are no known cases of neutral intergalactic clouds without associated st...

ar X iv : a st ro - p h / 98 11 24 4 v 1 1 6 N ov 1 99 8 Fast X - ray Variability of PKS 2155 – 304 : A Cross

ar X iv : a st ro - p h / 98 11 07 8 v 1 4 N ov 1 99 8 Selection Effects at 21 cm

Surveys in the 21cm line of neutral hydrogen are testing the completeness of the catalogs of nearby galaxies. The remarkable observational fact is that the potential wells that confine gas to sufficient density that it can remain neutral in the face of ionizing radiation also provide sites for star formation, so that there are no known cases of neutral intergalactic clouds without associated st...