Astronomy and Astrophysics – Astronomy
Scientific paper
May 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.5315b&link_type=abstract
American Astronomical Society, 192nd AAS Meeting, #53.15; Bulletin of the American Astronomical Society, Vol. 30, p.895
Astronomy and Astrophysics
Astronomy
Scientific paper
Measurements of the carbon isotopic ratio, (12) CO/(13) CO, in several planetary nebulae (PNe) have been determined by observing the millimeter and sub-millimeter transitions of CO with the NRAO 12m and SMTO 10m telescopes. These data help constrain mixing theories in stellar evolution models and provide a connection between similar measurements in red giant branch stars and the interstellar medium.
Balser Dana S.
McMullin Joseph Peter
Wilson Thomas L.
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