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Observing compact disks inside pre-PNe with the VLTI

Published online by Cambridge University Press:  30 August 2012

Stacey N. Bright ,
Orsola De Marco ,
Olivier Chesneau ,
Eric Lagadec ,
Hans Van Winckel  and
Bruce J. Hrivnak
Stacey N. Bright
Affiliation:
Macquarie University Research Centre in Astronomy, Astrophysics & Astrophotonics Macquarie University, NSW, Australia email: [email protected], [email protected]
Orsola De Marco
Affiliation:
Macquarie University Research Centre in Astronomy, Astrophysics & Astrophotonics Macquarie University, NSW, Australia email: [email protected], [email protected]
Olivier Chesneau
Affiliation:
Observatoire de la Côte d'Azur, Nice, France email: [email protected]
Eric Lagadec
Affiliation:
European Southern Observatory, Garching, Germany email: [email protected]
Hans Van Winckel
Affiliation:
Instituut voorSterrenkunde, Leuven, Belgium email: [email protected]
Bruce J. Hrivnak
Affiliation:
Valparaiso University, Valparaiso, Indiana, USA email: [email protected]
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Abstract

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AGB stars appear to lose mass spherically, but many PNe resulting from the AGB mass-loss have non-spherical morphologies. Compact disks have been found in some bipolar PNe, but their role in the shaping process remains unknown. Compact Keplerian disks are found to be common around post-AGB binaries, however, these objects may never develop into PNe. Another group of post-AGB stars, known as pre-PNe, are surrounded by collimated nebulae shining by reflected light or shock ionisation. We are observing the inner circumstellar regions of pre-PNe at high angular resolutions with the VLTI. We seek to compare pre-PNe disks to those around other post-AGB stars and PNe. New observations of the pre-PN, IRAS 16279-4757, show evidence for a disk similar to those seen in young PNe.

Keywords

instrumentation: high angular resolutioninstrumentation: interferometersstars: AGB and post-AGBstars: individual (IRAS 16279-4757)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S283: Planetary Nebulae: An Eye to the Future , July 2011 , pp. 115 - 118
Copyright
Copyright © International Astronomical Union 2012

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