4 papers
Properties of the warm magnetized ISM, as inferred from WSRT polarimetric imaging
M. Haverkorn, P. Katgert, A. G. de Bruyn
We describe a first attempt to derive properties of the regular and turbulent Galactic magnetic field from multi-frequency polarimetric observations of the diffuse Galactic synchro…
HI kinematics in a massive spiral galaxy at z=0.89
L. V. E. Koopmans, A. G. de Bruyn
We present a kinematic model of the neutral-hydrogen in the spiral galaxy of the lens system PKS1830-211, based on a Multi Element Radio-Linked Interferometer (MERLIN) 1.4-GHz radi…
Annual modulation in the scattering of J1819+3845: peculiar plasma velocity and anisotropy
J. Dennett-Thorpe, A. G. de Bruyn
We present two years of monitoring observations of the extremely variable quasar J1819+3845. We observe large yearly changes in the timescale of the variations (from ~ 1 hour to ~…
Extrinsic Radio Variability of JVAS/CLASS Gravitational Lenses
L. V. E. Koopmans, A. Biggs, R. D. Blandford +6
We present flux-ratio curves of the fold and cusp (i.e. close multiple) images of six JVAS/CLASS gravitational lens systems. The data were obtained over a period of 8.5 months in 2…