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Session 53 - SNs, Planetaries and Circumstellar Disks.
Display session, Wednesday, June 10
Atlas Ballroom,

[53.15] Observations of CO Isotopes in Planetary Nebulae

D. S. Balser, J. P. McMullin (NRAO), T. L. Wilson (MPIfR, SMTO)

Measurements of the carbon isotopic ratio, ^12CO/^13CO, 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.

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