C-13-ETHANE IN THE ATMOSPHERES OF JUPITER AND SATURN

Citation
Pv. Sada et al., C-13-ETHANE IN THE ATMOSPHERES OF JUPITER AND SATURN, The Astrophysical journal, 472(2), 1996, pp. 903-907
Citations number
29
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
0004-637X
Volume
472
Issue
2
Year of publication
1996
Part
1
Pages
903 - 907
Database
ISI
SICI code
0004-637X(1996)472:2<903:CITAOJ>2.0.ZU;2-K
Abstract
High-resolution C-12- and C-13-ethane spectra of Jupiter and Saturn we re acquired with the McMath-Pierce 60 inch (1.5 m) Telescope and Celes te, Goddard Space Flight Center's cryogenic grating spectrometer, in 1 995 November and December. A relative abundance ratio C-12/C-13 of 91( -13)(+26) for Jupiter and 99(-23)(+43) for Saturn was derived from the measurements. These nearly terrestrial values suggest little or no fr actionation of carbon isotopes in the atmospheres of Jupiter and Satur n. A weighted average of the available C-12/C-13 ratios for the outer planets yields 88+/-7, thus presenting no evidence for change in the c arbon isotopic ratio between the presolar nebula and the present atmos pheres of the outer planets.