37th DPS Meeting, 4-9 September 2005
Session 22 Outer Planets II
Oral, Tuesday, September 6, 2005, 11:00am-12:30pm, Law LG19

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[22.05] Visibility of Jupiter global oscillations with photometric measurements

P. Gaulme (LESIA, Observatoire de Paris), Planetologie Collaboration

The receipt for a successful study of the Jovian interior structure is given by the association of seismology and precise visible photometry. In this framework, the micro-satellite project JOVIS, presented to the French space agency (Mosser et al. 2004), is for Jupiter a copy of what the European space mission COROT is for the stars (Baglin et al. 1998). The Jovian visible flux being dominated by the albedo map, an accurate analysis of the cloud response to a seismic wave is needed. Therefore, we have revisited the propagation of sound waves in the Jovian troposphere, in order to estimate how they affect the albedo of the uppest clouds layer, composed of ammonia ice. The relative variations of albedo generated by an acoustic wave reach the 70-ppm level, what would be observable from space and would allow the detection of 4 mm/s waves. Moreover, the detection of Jovian global oscillations implies the identification of the modes in noisy images. We present a method to filter the mode signatures in simulations of Jupiter images as seen by JOVIS.

Baglin et al. 1998. 185 IAU. Symp. pp. 301. Kyoto. Mosser et al. 2004. SF2A-2004 pp. 257. EdP-Sciences, Les Ulis.

The author(s) of this abstract have provided an email address for comments about the abstract: Patrick.Gaulme@obspm.fr

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