Physics
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.577...61e&link_type=abstract
In: Proceedings of the dusty and molecular universe: a prelude to Herschel and ALMA, 27-29 October 2004, Paris, France. Ed. by A
Physics
2
Solar System, Infrared, Submillimetre, Spectroscopy, Millimetre Spectroscopy
Scientific paper
As solar-system bodies are cold objects, the low-frequency range, from the far-infrared to the millimetre, is very well suited for the study of planetary and cometary atmospheres, especially with heterodyne spectroscopy. Important results have been obtained in the past with ground-based antennas (detection of an atmosphere around Io, new species in Jupiter after Shoemaker-Levy 9 collision, about 20 parent molecules in comets). Herschel is expected to bring a major contribution to the study of water in the solar system (water cycle on Mars, oxygen external source in the giant planets, activity monitoring of comets, search for activity in distant objects, D/H in Kuiper-belt comets). Herschel will also accurately measure the D/H ratio in giant planets, a key parameter for understanding their formation processes. Both Herschel and ALMA will be used for searching for new minor species in planetary and cometary atmospheres, and for measuring the diameters of many trans-neptunian objects. Finally ALMA will be best suited for building 3-D dynamical pictures of planets, satellites and comets.
Bockelée-Morvan Dominique
Crovisier Jacques
Encrenaz Th.
Lellouch Emmanuel
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