Detection of CO emission from two distant, non-variable OH/IR stars

Details Detection of CO emission from two distant, non-variable OH/IR stars Detection of CO emission from two distant, non-variable OH/IR stars

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...245..195w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 245, no. 1, May 1991, p. 195-198. NFR-supported research.

Astronomy and Astrophysics

Astrophysics

6

Carbon Monoxide, Hydroxyl Emission, Infrared Stars, Stellar Mass Ejection, Stellar Spectra, Emission Spectra, Milky Way Galaxy

Scientific paper

The detection of CO(J = 1-0), and (J = 2-1) emission towards two distant OH/IR stars, OH0.3-0.2 and OH18.5 + 1.4 is reported. From the CO(J = 1-0) emission, the estimated mass loss rates are 0.000012 and 0.000016 solar mass/yr, respectively. These mass loss rates are lower by a factor of 2 compared to those estimated from the OH 1612 MHz maser emission. The detected sources belong to a small group of OH/IR stars without significant variability in the OH 1612 MHz maser emission. It has been suggested that such objects are in the transition phase between highly evolved Asymptotic Giant Branch stars and planetary nebulae. IR observations of both objects support this suggestion.

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