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Millimeter-wave interferometry of Proto-Planetary Nebulae

Published online by Cambridge University Press:  25 May 2016

A. Dayal ,
J. H. Bieging  and
P. Bergman
A. Dayal
Affiliation:
Steward Observatory, Tucson, USA Caltech, Pasadena, USA
J. H. Bieging
Affiliation:
Steward Observatory, Tucson, USA Caltech, Pasadena, USA
P. Bergman
Affiliation:
Onsala Space Obs., Sweden Onsala Space Obs., Sweden

Extract

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We have observed 2 compact PPNe, AFGL 2343 and IRAS 22272+5435, in the CO J=1-0 transition using the Owens Valley interferometer (OVRO), and the NRAO 12-meter telescope. Our observations were made in the low and intermediate resolution configurations of the interferometer and we obtain a synthesized beam (HPBW) of ≃ 4″. We are now modelling both sources using statistical equilibrium/radiative transfer codes. Our objectives are to a) map the distribution and kinematics of the molecular gas at high angular resolution and b) estimate the physical conditions (mass loss rate, temperature, density) in the molecular envelopes, through our models.

Type
V. From AGB to Planetary Nebulae
Information
Symposium - International Astronomical Union , Volume 180: Planetary Nebulae , 1997 , pp. 346
Copyright
Copyright © Kluwer 1997