4 papers
A Speculation into the Origin of Neutral Globules In Planetary Nebulae: Could the Helix's Comets Really Be Comets?
Grant Gussie
A novel explanation for the origin of the cometary globules within NGC 7293 (the "Helix" planetary nebula) is examined; that these globules originate as massive cometary bodies at…
Molecular Photodissociation in the Neutral Envelopesof Planetary Nebulae
G. T. Gussie, A. R. Taylor, P. E. Dewdney +1
The dissociation and subsequent ionisation of molecular material in a detached, spherically symmetric stellar wind is modelled as a star evolves from the post-asymptotic giant bran…
HI and CO Observations of Circumnebular Envelopes of Planetary Nebulae
G. T. Gussie, A. R. Taylor
21cm spectral-line and continuum observations of ten compact planetary nebulae have been made with the Very Large Array. Circumnebular atomic hydrogen is identified in the planetar…
The Classification of M1-78
G. T. Gussie
The published properties of M1-78 are discussed with the purpose to resolve the object's classification as either a planetary nebula or an ultracompact HII region. A classification…