The molecular emission of young preplanetary nebulae

Details The molecular emission of young preplanetary nebulae The molecular emission of young preplanetary nebulae

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...257..701b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 257, no. 2, p. 701-714.

Astronomy and Astrophysics

Astrophysics

92

Asymptotic Giant Branch Stars, Emission Spectra, Planetary Nebulae, Stellar Evolution, Abundance, Astronomical Spectroscopy, Carbon Monoxide, Far Infrared Radiation, Stellar Envelopes

Scientific paper

Molecular observations are presented of several preplanetary nebulae (PPNe) identified from their peculiar IR spectrum. Detections of (C-12)O and (C-13)O J = 2-1, 1-0 emission in four subjects are reported: IRAS 07134 + 1005, IRAS 17436 + 5003, IRAS 19114 + 0002, and IRAS 19500 - 1709. SiO J = 3-2, 2-1 was detected in IRAS 19114 + 0002; HCN J = 1-0 in IRAS 07134 + 1005, IRAS 17436 + 5003, and IRAS 19500- 1709. Evident signs of a bipolar structure were found in IRAS 19114 + 0002 and IRAS 19500 - 1709. In IRAS 19500 - 1709, wide and relatively intense wings were found in (C-12)O and (C-13)O, which are considered to be produced by a high-velocity bipolar outflow that involves a significant fraction of the total molecular envelope.

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