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Article
The Fine Structures of Planetary Nebulae
Most theoretical studies of the dynamics of planetary nebulae assume that the slow ejecta from the red-giant or asymptotic giant branch phase of evolution of the central star is distributed smoothly. We consid...
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Article
Truncated Collimated Flows in Abell 30, Abell 78 and the Honeycomb Nebula
Localised collimated flows of ionized gas are found in two hydrogen deficient planetary nebulae, Abell 30 and Abell 78 as well as in the Honeycomb complex of interlocking shells in halo of 30 Dor in the Large ...
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Article
A pair of Chimneys in the Starburst Galaxy M82
A VLA image of a pair of galactic chimneys emerging from the core of the starburst galaxy M82 is presented. The area of our images corresponds to the the base of the superwind from M82. The presence of these c...
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Article
All's knot quiet on the recombination front
Molecular clouds are clumpy on length scales down to the limits of observational resolution. At least some ultracompactHii regions (UCHiiR) may result from the interaction of a young early type star and this type...
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Chapter and Conference Paper
All’s Knot Quiet on the Recombination Front
Molecular clouds are clumpy on length scales down to the limits of observational resolution. At least some ultracompact Hii regions (UCHiiR) may result from the interaction of a young early type star and this typ...