3 papers
astro-ph2000
Subparsec-scale HI in the nucleus of NGC 4151
C. G. Mundell, J. M. Wrobel, A. Pedlar +1
We present sensitive, high-resolution 21-cm VLBA+VLA observations of the radio jet and nuclear HI absorption in NGC 4151. The 25-mas (1.6-pc) resolution continuum image reveals a h…
astro-ph2000
The Nature of Flat-Spectrum Nuclear Radio Emission in Seyfert Galaxies
C. G. Mundell, A. S. Wilson, J. S. Ulvestad +1
Parsec-scale VLBA imaging of five Seyfert galaxies with flat-spectrum radio nuclei was conducted to determine whether the flat spectrum represents thermal emission from the accreti…
astro-ph1997
Localised Neutral Hydrogen Absorption Towards the Radio Jet of Markarian 6
J. F. Gallimore, A. J. Holloway, A. Pedlar +1
We present 0.15 arcsec (56 pc) resolution MERLIN observations of neutral hydrogen (HI) 21 cm absorption detected towards the arcsecond-scale radio jet of the Seyfert 1.5 galaxy Mar…