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Early Disk Evolution
Mark Wardle
A variety of processes play a role in the evolution of protostellar disks. Here I focus on the uncertain issue of magnetic field-disk coupling and its implications for magnetically…
The Eye of the Tornado - an isolated, high mass young stellar object near the Galactic centre
M. G. Burton, J. S. Lazendic, F. Yusef-Zadeh +1
We present infrared (AAT, UKIRT) and radio (VLA, SEST) observations of the Eye of the Tornado, a compact source apparently near the head of the Tornado Nebula. The near-infrared Br…
Magnetorotational instability in stratified, weakly ionised accretion discs
Raquel Salmeron, Mark Wardle
We present a linear analysis of the vertical structure and growth of the magnetorotational instability in stratified, weakly ionised accretion discs, such as protostellar and quies…
Magnetorotational instability in weakly ionised, stratified accretion discs
Raquel Salmeron, Mark Wardle
The magnetorotational instability (MRI) (Balbus and Hawley 1991, Hawley and Balbus 1991) transports angular momentum radially outwards in accretion discs through the distortion of…
Star Formation and the Hall Effect
Mark Wardle
The breakdown of flux-freezing in molecular clouds and protostellar discs is usually approximated by ambipolar diffusion at low densities or by resistive diffusion at high densitie…
Nonthermal Emission from the Arches Cluster (G0.121+0.017) and the Origin of -ray Emission from 3EG J1746-2851
F. Yusef-Zadeh, M. Nord, M. Wardle +3
High resolution VLA observations of the Arches cluster near the Galactic center show evidence of continuum emission at 3.6, 6, 20 and 90cm. The continuum emission at 90cm is…