Resumen
High-resolution 12C- and 13C-ethane spectra of
Jupiter and Saturn were acquired with the McMathPierce 60 inch (1.5 m)
Telescope and Celeste, Goddard Space Flight Center's cryogenic grating
spectrometer, in 1995 November and December. A relative abundance ratio
12C/13C of 91+26-13 for
Jupiter and 99+43-23 for Saturn was derived from
the measurements. These nearly terrestrial values suggest little or no
fractionation of carbon isotopes in the atmospheres of Jupiter and
Saturn. A weighted average of the available 12C/13
ratios for the outer planets yields 88±7, thus presenting no
evidence for change in the carbon isotopic ratio between the presolar
nebula and the present atmospheres of the outer planets.
Idioma original | English |
---|---|
Páginas (desde-hasta) | 903 |
Publicación | Astrophysical Journal v.472 |
Volumen | 472 |
DOI | |
Estado | Published - 1 dic 1996 |