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7. Carbon Isotope Ratio in Comets and Interstellar Matter

Published online by Cambridge University Press:  12 April 2016

V. Vanysek

Abstract

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The 12C/13C isotope ratio in the interstellar medium and in stellar atmospheres is discussed and compared to the value found in the solar system and especially in comets. The cometary value (≥ 100) tends to be slightly above the terrestrial value (89) and is definitively higher than that for interstellar molecular clouds (about 30 to 50). This result implies that comets are not of interstellar origin.

Type
Part VIII. The Origin of Comets
Information
International Astronomical Union Colloquium , Volume 39: Comets, Asteroids, Meteorites: Interrelations, Evolution and Origins , December 1977 , pp. 499 - 503
Copyright
Copyright © A.H. Delsemme 1977

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