ar X iv : a st ro - p h / 99 06 34 3 v 1 2 2 Ju n 19 99 The heating of the ICM by powerful radio sources

ar X iv : a st ro - p h / 99 06 25 1 v 1 1 5 Ju n 19 99 Inflow and outflows in NGC 2992 / 3

We present observational evidences for inflow and outflows in the interacting system Arp 245 (NGC 2992/3).

ar X iv : a st ro - p h / 99 02 06 2 v 1 4 F eb 1 99 9 SOURCES OF RELATIVISTIC JETS IN THE GALAXY

ar X iv : a st ro - p h / 99 06 35 8 v 1 2 3 Ju n 19 99 Helical motions in the jet of blazar 1156 + 295

The blazar 1156+295 was observed by VLBA and EVN + MERLIN at 5 GHz in June 1996 and February 1997 respectively. The results show that the jet of the source has structural oscillations on the milliarcsecond scale and turns through a large angle to the direction of the arcsecond-scale extension. A helical jet model can explain most of the observed properties of the radio structure in 1156+295.

ar X iv : a st ro - p h / 99 06 50 0 v 1 3 0 Ju n 19 99 Turbulent Particle Acceleration in the Diffuse Cluster Plasma

In situ particle acceleration is probably occur-ing in cluster radio haloes. This is suggested by the uniformity and extent of the haloes, given that spatial diffusion is slow and that radiative losses limit particle lifetimes. Stochastic acceleration by plasma turbulence is the most likely mechanism. Alfven wave turbulence has been suggested as the means of acceleration, but it is too slow to ...

ar X iv : a st ro - p h / 99 06 46 9 v 1 2 9 Ju n 19 99 What will the next generation radio telescope detect at 1 . 4 GHz ?

An international project is underway to design and build a radio telescope with an effective collecting area two orders of magnitude greater than the largest existing instruments. One of the many scientific goals of this instrument will be the investigation of the extragalactic radio source population at flux densities two to three orders of magnitude fainter than the limits of existing observa...