ar X iv : a st ro - p h / 06 11 30 1 v 1 9 N ov 2 00 6 Observations of the Li , Be , and B isotopes and constraints on cosmic - ray propagation

ar X iv : a st ro - p h / 01 01 06 8 v 1 4 J an 2 00 1 MODELS FOR GALACTIC COSMIC - RAY PROPAGATION

A new numerical model of particle propagation in the Galaxy has been developed, which allows the study of cosmic-ray and gamma-ray production and propagation in 2D or 3D, including a full reaction network. This is a further development of the code which has been used for studies of cosmic ray reacceleration, Galactic halo size, antiprotons and positrons in cosmic rays, the interpretation of dif...

ar X iv : a st ro - p h / 06 11 09 9 v 1 2 N ov 2 00 6 Nuclear Activity in UZC Compact Groups of Galaxies

ar X iv : a st ro - p h / 06 11 30 3 v 1 9 N ov 2 00 6 Flat rotational curves without dark matter

We consider the singular configurations of gravitating gas [1] which could be used as a model for disk galaxies. The simplest steady configuration , which corresponds to rotation of stars around center gives flat rotational curve, provided the density distrubution has a tail, decaying as 1/r. This result based exclusively on Newtonian gravity and does not involve dark matter.

ar X iv : a st ro - p h / 06 11 54 4 v 1 1 6 N ov 2 00 6 Discovery of a nearby twin of SN 1987 A ’ s nebula around the

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