OH maser emission from young planetary nebulae

Details OH maser emission from young planetary nebulae OH maser emission from young planetary nebulae

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...217..157z&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 217, no. 1-2, June 1989, p. 157-178. Research supported by ZWO.

Astronomy and Astrophysics

Astrophysics

97

Hydroxyl Emission, Infrared Stars, Interstellar Masers, Planetary Nebulae, Stellar Evolution, Asymptotic Giant Branch Stars, Color-Color Diagram, Very Large Array (Vla)

Scientific paper

OH emission, primarily in the 1612 MHz satellite line and also in the main lines, is detected in a number of young planetary nebulae. These objects form a direct observational link between the evolved OH/IR stars and planetary nebulae. In this paper, the observations are presented and the implications for various aspects of Post-Asymptotic Giant Branch evolution are discussed. Lifetimes and birthrates of this evolutionary stage are calculated. A scheme for classifying preplanetary nebula objects is proposed.

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