76 citations · 581 across the 46 of their papers we have counts for
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Morphokinematic modelling of the point-symmetric Cat's Eye, NGC 6543: Ring-like remnants of a precessing jet
Ryan Clairmont, Wolfgang Steffen, Nico Koning
The planetary nebula known as the Cat's Eye Nebula (NGC 6543) has a complex, point-symmetric morphology that cannot be fully explained by the current theory of planetary nebula for…
HST-Scale 3D simulations of MHD disc winds : A rotating two-component jet structure
Jan Staff, Nico Koning, Rachid Ouyed +2
We present the results of large scale, three-dimensional magneto-hydrodynamics simulations of disc-winds for different initial magnetic field configurations. The jets are followed…
Towards Non-spherical Radio Models
Valério A. R. M. Ribeiro, Wolfgang Steffen, Laura Chomiuk +3
Radio observations of novae in outburst are of particular interest due to the physical parameters that may be retrieved from fitting the radio light curves. Most models that have f…
Radio Frequency Models of Novae in eruption. I. The Free-Free Process in Bipolar Morphologies
V. A. R. M. Ribeiro, L. Chomiuk, U. Munari +6
Observations of novae at radio frequencies provide us with a measure of the total ejected mass, density profile and kinetic energy of a nova eruption. The radio emission is typical…
A wind-shell interaction model for multipolar planetary nebulae
W. Steffen, N. Koning, A. Esquivel +4
We explore the formation of multipolar structures in planetary and pre-planetary nebulae from the interaction of a fast post-AGB wind with a highly inhomogeneous and filamentary sh…
CO Structure of the 21 Micron Source IRAS 22272+5435: A Sign of a Jet Launch?
Jun-ichi Nakashima, Nico Koning, Nikolaus H. Volgenau +3
We report the results of radio interferometric observations of the 21-micron source IRAS 22272+5435 in the CO J=2-1 line. 21-micron sources are carbon-rich objects in the post-AGB…