ar X iv : a st ro - p h / 02 07 51 6 v 1 2 3 Ju l 2 00 2 Anisotropies in the Motions and Positions of the Galactic Globular Clusters

ar X iv : a st ro - p h / 02 10 42 8 v 1 1 8 O ct 2 00 2 Star Clusters in Interacting Galaxies : The Case of M 51 Nate

ar X iv : a st ro - p h / 02 12 56 6 v 1 3 0 D ec 2 00 2 Dark Energy : Is it Q or Λ ?

New observations of Cosmic Microwave Background Anisotropies, Su-pernovae luminosity distances and Galaxy Clustering are sharpening our knowledge about dark energy. Here we present the latest constraints.

ar X iv : a st ro - p h / 06 05 00 8 v 1 2 9 A pr 2 00 6 Simulations of globular clusters merging in galactic nuclear regions

We present the results of detailed N-body simulations regarding the interaction of four massive globular clusters in the central region of a triaxial galaxy. The systems undergo a full merging event, producing a sort of 'Super Star Cluster' (SSC) whose features are close to those of a superposition of the individual initial mergers. In contrast with other similar simulations, the resulting SSC ...

ar X iv : a st ro - p h / 06 07 53 9 v 1 2 4 Ju l 2 00 6 CLUSTERS AND THE COSMIC WEB : Identifying the location of filaments

ar X iv : a st ro - p h / 03 02 14 3 v 1 7 F eb 2 00 3 Search for relativistic beaming in ultraluminous X – ray sources

The nature of the ultraluminous X–ray sources (ULX) is still to be understood. Several hypotheses have been suggested to explain the high X–ray luminosity: stellar mass black holes with emission collimated by relativistic effects or anisotropies in the accretion disk, intermediate mass black holes, young supernovae remnants, background active galactic nuclei. To discriminate among the above hyp...