ar X iv : a st ro - p h / 02 10 10 2 v 1 3 O ct 2 00 2 Linear and Circular Polarization Properties of Jets ∗

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 10 04 2 v 1 1 O ct 2 00 2 Variable Speed of Light Theories

Two variable speed of light models and their physical consequences are investigated. Talk given at the workshop on varying fundamental constants, JENAM 2002, Porto, Portugal, September 2-7, 2002. To be published in the proceedings by Kluwer publications. 1. Varying Speed of Light Cosmology: An Alternative to In-

ar X iv : a st ro - p h / 06 10 08 7 v 1 3 O ct 2 00 6 Jets and Disk - Winds from Pulsar Magnetospheres

We discuss axisymmetric force-free pulsar magnetospheres with magnetically collimated jets and a disk-wind obtained by numerical solution of the pulsar equation. This solution represents an alternative to the quasi-spherical wind solutions where a major part of the current flow is in a current sheet which is unstable to magnetic field annihilation.

ar X iv : a st ro - p h / 04 10 29 7 v 1 1 2 O ct 2 00 4 Multiwavelength evidence of the physical processes in radio jets

Over the last few years, high-quality X-ray imaging and spectroscopic data from Chandra and XMM-Newton have added greatly to the understanding of the physics of radio jets. Here we describe the current state of knowledge with an emphasis on the underlying physics used to interpret multiwavelength data in terms of physical parameters.

ar X iv : a st ro - p h / 02 10 03 7 v 1 1 O ct 2 00 2 From Spirals to Low Surface Brightness galaxies

We show that simple models of the chemical and spectrophotometric evolution of galaxies can be used to explore the properties of present-day galaxies and especially the causes of the observed variety among disc galaxies. We focus on the link between " classical " spirals and Low Surface Brightness galaxies.