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Axisymmetry in protoplanetary nebulae: using imaging polarimetry to investigate envelope structure
(2001-04)
We use ground-based imaging polarimetry to detect and image the dusty circumstellar envelopes of a sample of proto-planetary nebulae (PPNe) at near-infrared wavelengths. This technique allows the scattered light from the ...
OH maser mapping of the evolved star HD 179821: evidence for interacting outflows
(2001)
The evolved star HD 179821 continues to be the subject of much debate as to whether it is a nearby post-asymptotic giant branch (post-AGB) star or a distant high initial mass post-red supergiant. We have mapped the OH maser ...