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[en] The oscillations of Jupiter, if detectable, would constrain theories of its interior. This work predicts the pattern of expected pressure modes, using the ray tracing method. According to current models of internal structure, the planet exhibits two discontinuities in the sound speed. The first one is located in the hydrogen-helium envelope around the 3Mbar pressure level and corresponds to the transition of molecular to metallic hydrogen, while the second one corresponds to the transition between the envelope and the high density core. Observations of low degree p-modes, obtainable from the ground, would accurately provide the value of the radius of the planetary core; observations of high degree modes, conducted from space, would provide a signature of the external transition
[fr]
Si Jupiter pulse comme le soleil, la detection eventuelle de ses oscillations permettrait d'approfondir considerablement notre connaissance de la structure interne de la planete. On calcule ici le spectre theorique des oscillations de pression dans l'approximation de l'optique geometrique. Les modeles actuels de structure interne de Jupiter predisent l'existence de deux discontinuites dans le profil de vitesse du son, l'une au sein de l'enveloppe fluide lorsque l'hydrogene moleculaire passe en phase metallique, l'autre a la frontiere entre l'enveloppe fluide et le noyau compose d'elements lourds. On montre que la mesure des modes de faible degre permettrait de determiner le diametre du noyau; celle des modes de degre eleve pourrait localiser la discontinuite externe ou a lieu la transition de phase de l'hydrogeneJournal
Comptes Rendus des Seances de l'Academie des Sciences, Serie 2; ISSN 0249-6305; 
; CODEN CRSUD; v. 307(14); p. 1641-1646
; CODEN CRSUD; v. 307(14); p. 1641-1646