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The helium abundance of Jupiter from Voyager

Gautier, D. ; Conrath, B. ; Flasar, M. ; Hanel, R. ; Kunde, V. ; Chedin, A. ; Scott, N.

Journal of Geophysical Research, 1981-09, Vol.86 (A10), p.8713-8720 [Periódico revisado por pares]

Blackwell Publishing Ltd

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  • Título:
    The helium abundance of Jupiter from Voyager
  • Autor: Gautier, D. ; Conrath, B. ; Flasar, M. ; Hanel, R. ; Kunde, V. ; Chedin, A. ; Scott, N.
  • É parte de: Journal of Geophysical Research, 1981-09, Vol.86 (A10), p.8713-8720
  • Notas: ArticleID:80C1671
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    content type line 23
  • Descrição: The helium abundance in the Jovian atmosphere is derived from Voyager 1 data by two methods. The first method uses only infrared spectra from selected locations on the planet while the second method uses a thermal profile independently derived from radio occultation measurements and infrared spectra recorded near the occultation point. A hydrogen mole fraction of 0.897±0.030 is obtained from the first method, while the second method gives 0.880±0.036, corresponding to helium mass fractions of 0.19±0.05 and 0.21±0.06, respectively. The estimated errors for the first method are primarily due to systematic uncertainties in the H2 and He absorption coefficients, while those for the second method result mainly from errors in the radio occultation profile and are less well known. Random errors in the measured infrared spectra are found to be negligible in both cases. The results are consistent with a uniform mix of hydrogen and helium within Jupiter's interior, but a modest amount of helium depletion (ΔY ≤0.05) cannot be excluded.
  • Editor: Blackwell Publishing Ltd
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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