Computer Science – Sound
Scientific paper
Sep 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996dps....28.2251m&link_type=abstract
American Astronomical Society, DPS meeting #28, #22.51; Bulletin of the American Astronomical Society, Vol. 28, p.1151
Computer Science
Sound
Scientific paper
Seismic observations were performed immediately after the impacts of Shoemaker-Levy 9 fragments A and H with the mid-IR camera \timmi\ at the ESO 3.6-m telescope, and one week after the impacts with \timmi, \camiras\ at the NOT and c10\mu at the CFHT. These mid-IR cameras allowed us to monitor the atmospheric temperature over the full planetary disk, and to search for possible perturbations due to sound waves. The hodogram analysis has been unable to detect any seismic signature of the primary pressure waves crossing the planet within two hours following each impact (Mosser et al. 1996). This non-detection implies that the kinetic energy of impacts A and H was less than 2* 10(21) J, within the frame of the theoretical simulation (Lognonne et al. 1994). The error bar is as large as one order of magnitude. Pressure modes (resonant waves with periods in excess of 5.5 minutes, trapped in the Jovian cavity) were searched during the week following the impacts period. Even if the energy deposited by all the impacts was certainly too low to excite detectable modes, the 40-hour observation provided a unique time series for the monitoring of the Jovian normal modes. The main steps of the data reduction and analysis will be presented (centering of the IR images, decomposition of the Jovian thermal map in spherical harmonics...), as well as by-products (10-mu m maps of Jupiter...). Lognonne Ph., Mosser B., Dahlen F.} 1994. Excitation of Jovian seismic waves by the Shoemaker-Levy/9 cometary impact. Icarus 110, 180-195 Mosser B., et al. 1996. Impact seismology: a search for primary pressure waves following impacts A and H. Icarus 121, 331-340
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