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Quantitative Analysis of Carbon Isotope Ratios in N-, SC-, and J-type Carbon Stars
Published online by Cambridge University Press: 25 May 2016
Abstract
We present the results of a quantitative analysis of 12C/13C ratios in 62 N-type, 15 SC-type, and 26 J-type carbon stars. The 12C/13C ratios are determined from lines of the CN Red System around 8000 Å, based on the iso-intensity method and line-blanketed model atmospheres. The resulting 12C/13C ratios in N- and SC-type carbon stars are consistent with a scenario in which M giants evolve through SC- to N-type carbon stars, as 12C produced during thermal pulses is added to the envelope.
- Type
- Session II — Models and Abundance Determinations
- Information
- Symposium - International Astronomical Union , Volume 177: The Carbon Star Phenomenon , 2000 , pp. 81 - 87
- Copyright
- Copyright © Kluwer 2000