4 papers
Neutral Hydrogen in Galaxy Groups
N. P. F. McKay, C. G. Mundell, S. Brough +2
We present preliminary results from a study of the neutral hydrogen (HI) properties of an X-ray selected sample of nearby loose galaxy groups. This forms part of a multi-wavelength…
Gigahertz-Peaked Spectrum Radio Sources in Nearby Galaxies
N. M. Nagar, A. S. Wilson, H. Falcke +2
There is now strong evidence that many low-luminosity AGNs (LLAGNs) contain accreting massive black holes and that the nuclear radio emission is dominated by parsec-scale jets laun…
Parsec-Scale Jets and Tori in Seyfert Galaxies
A. L. Roy, J. M. Wrobel, A. S. Wilson +6
What causes the dichotomy between very powerful and very weak radio emission from AGNs? Perhaps the engines are the same but the jets get disrupted by dense ISM in radio-quiet obje…
Free-Free Absorption on Parsec Scales in Seyfert Galaxies
A. L. Roy, J. S. Ulvestad, A. S. Wilson +5
Seyfert galaxies come in two main types (types 1 and 2) and the difference is probably due to obscuration of the nucleus by a torus of dense molecular material. The inner edge of t…