Thursday, 5 June, 1997 at 2:30pm

Jane Greaves - JAC

"Carbon stars and the evolving interstellar medium"

ABSTRACT: "The results are presented from a JCMT survey of nearby carbon stars. We detected 12CO and 13CO J=2-1 emission from all the high mass-loss objects (visible from Hawaii) within 1 kpc of the Sun. These stars pump 13C-rich material into the local interstellar medium, and dominate its changing abundances. The JCMT data have resolved the discrepancy between the solar 12C/13C abundance ratio and the values found in nearby interstellar clouds."