ar X iv : a st ro - p h / 96 01 08 3 v 1 1 5 Ja n 19 96 The Statistics of the large – scale Velocity Field

ar X iv : a st ro - p h / 96 01 12 9 v 1 2 3 Ja n 19 96 Is Her X - 1 a strange star

The possible identification of Her X-1 with a strange star (Li et al. 1995) is shown to be incorrect.

ar X iv : a st ro - p h / 96 01 08 1 v 1 1 5 Ja n 19 96 Projection Effects in the Abell Catalogue

We investigate the influence that projection effects have on the completeness of the the Abell cluster catalogue in the context of an Ω 0 = 1 CDM Universe. We construct a galaxy catalogue and identify clusters using an algorithm that mimics Abell's method. Over 30% of Richness Class ≥1 clusters have been selected despite not meeting the required intrinsic (3D) richness criterion. Velocity dispe...

ar X iv : a st ro - p h / 97 01 22 8 v 1 2 9 Ja n 19 97 Large - scale Structures revealed by Wavelet Decomposition 1

ar X iv : a st ro - p h / 96 01 16 3 v 1 2 9 Ja n 19 96 Lagrangian Dynamics of Collisionless Matter

The non–linear dynamics of self–gravitating irrotational dust is analyzed in a general relativistic framework, using synchronous and comoving coordinates. Writing the equations in terms of the metric tensor of the spatial sections orthogonal to the fluid flow allows an unambiguous expansion in inverse powers of the speed of light. The Newtonian and post–Newtonian approximations are derived in L...

ar X iv : a st ro - p h / 96 01 09 2 v 1 1 7 Ja n 19 96 The dynamical evolution of massive black hole binaries

The stellar ejection rate and the rates of change of the binary semimajor axis and eccentricity are derived from scattering experiments for the restricted three-body problem. They are used to study the evolution of binaries in simple models for galactic nuclei, starting soon after the black holes become bound and continuing until the evolution is dominated by the emission of gravitational radia...