Molecular Gas Images of Proto-planetary Nebulae

Details Molecular Gas Images of Proto-planetary Nebulae Molecular Gas Images of Proto-planetary Nebulae

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001assl..265..369m&link_type=abstract

Post-AGB Objects as a Phase of Stellar Evolution, Proceedings of the Toruń Workshop held July 5-7, 2000. Edited by R. Szczerba a

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

We present preliminary results from a 12CO J = 1--0 imaging survey of evolved stars which includes the PPNe: IRAS 22272+5435, HD 161796 IRAS 17436+5003 and AFGL 2343. IRAS 19114+0002 This survey complements the low excitation atomic gas study presented here by Fong et al. and Castro-Carrizo et al. The CO emission images of these three PPNe reveal round and detached ring structures that are expanding. These simple structures contrast with the bipolar outflows embedded in the larger envelopes of the two best studied PPNe, AFGL 618 and AFGL 2688.

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