CO observations of very cold southern circumstellar shells and pre-planetary nebulae

Details CO observations of very cold southern circumstellar shells and pre-planetary nebulae CO observations of very cold southern circumstellar shells and pre-planetary nebulae

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...227l..29l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 227, no. 2, Jan. 1990, p. L29-L32.

Astronomy and Astrophysics

Astronomy

59

Carbon Monoxide, Planetary Nebulae, Stellar Envelopes, Stellar Evolution, Abundance, Asymptotic Giant Branch Stars, Color-Color Diagram, Infrared Astronomy Satellite, Late Stars

Scientific paper

This paper reports on a CO(1-0) survey for very cold circumstellar envelopes made with the SEST telescope. The sources were selected from the IRAS Point Source Catalog and are probably rapidly evolving between the asymptotic giant branch and planetary nebulae. Nine of them were detected as evolved stars, of which four have an early type optical counterpart, including two stars classified as Be. HD 101584, a high latitude F supergiant has a remarkably broad CO spectrum, similar to OH231.8 + 4.2, with a total velocity extent of about 350 km/s. It probably belongs to a binary system, which could provide the mechanism for the observed violent ejection.

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