Shape: A 3D Modeling Tool for Astrophysics
- W. Steffen, N. Koning, S. Wenger, C. Morisset, M. Magnor
- 10 March 2010
Physics, Geology
IEEE Transactions on Visualization and Computer…
The tool allows astrophysicists to provide a priori knowledge about the object by interactively defining 3D structural elements and by direct comparison of model prediction with observational data, model parameters can then be automatically optimized to fit the observation.
Evidence for an outflow from the Seyfert galaxy NGC
- P. Christopoulou, A. J. Holloway, '. A.Pedlar
- 21 August 1996
Physics
New observations using narrow band imaging, long-slit spectroscopy and MERLIN observations of the nuclear region of the Seyfert galaxy NGC 4051 have been made. An edge brightened, triangular region…
ALMA data suggest the presence of spiral structure in the inner wind of CW Leonis
- L. Decin, A. Richards, D. Neufeld, W. Steffen, G. Melnick, R. Lombaert
- 8 October 2014
Physics
Context. Evolved low-mass stars lose a significant fraction of their mass through stellar winds. While the overall morphology of the stellar wind structure during the asymptotic giant branch (AGB)…
A morpho-kinematic and spectroscopic study of the bipolar nebulae: M 2-9, Mz 3, and Hen 2-104
- N. Clyne, S. Akras, W. Steffen, M. Redman, D. Gonçalves, E. Harvey
- 17 September 2015
Physics
Context. Complex bipolar shapes can be generated either as a planetary nebula or a symbiotic system. The origin of the material ionised by the white dwarf is very different in these two scenarios,…
The San Pedro Mártir Kinematic Catalogue of Galactic Planetary Nebulae
The San Pedro Martir kinematic catalogue of galactic planetary nebulae provides spatially resolved, long-slit, Echelle spectra for about 600 planetary nebulae. The data are presented wavelength…
Morpho-Kinematic Modeling of Gaseous Nebulae with Shape
- W. Steffen, J. López
- 26 January 2006
Physics
We present a powerful new tool to analyse and disentangle the 3-D geometry and kinematic structure of gaseous nebulae. The method consists in combining commercially available digital animation…
The Hubble-Type Outflows from the High-Excitation, Polypolar Planetary Nebula NGC 6302
- J. Meaburn, J. López, W. Steffen, M. Graham, A. J. Holloway
- 28 July 2005
Physics
Spatially resolved profiles of the Hα and [N II] lines have been obtained at unprecedented signal-to-noise ratios over the outflowing lobes of the high-excitation, polypolar planetary nebula NGC…
The nature of the cometary knots in the Helix planetary nebula (NGC 7293)
- J. Meaburn, C. Clayton, M. Bryce, J. Walsh, A. J. Holloway, W. Steffen
- 21 February 1998
Physics
The system of cometary knots in the Helix planetary nebula (NGC 7293) has been systematically observed using ground-based images and long-slit, high-resolution spectroscopy. CCD images in the [N ii]…
Shadows behind Neutral Clumps in Photoionized Regions
- J. Cantó, A. Raga, W. Steffen, P. Shapiro
- 1 August 1998
Physics
Shadows behind neutral clumps in photoionized regions can have a neutral core surrounded by gas that is photoionized by the diffuse flux produced by the nebula. We present a simple analytic model…
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