The Herschel-SPIRE submillimetre spectrum of Mars
HARTOGH, P.
Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research [MPS]
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Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research [MPS]
HARTOGH, P.
Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research [MPS]
Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research [MPS]
BLECKA, M.
Polska Akademia Nauk = Polish Academy of Sciences = Académie polonaise des sciences [PAN]
Polska Akademia Nauk = Polish Academy of Sciences = Académie polonaise des sciences [PAN]
BILLEBAUD, F.
Observatoire aquitain des sciences de l'univers [OASU]
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
Université Sciences et Technologies - Bordeaux 1 [UB]
Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
Observatoire aquitain des sciences de l'univers [OASU]
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
Université Sciences et Technologies - Bordeaux 1 [UB]
Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
CAVALIÉ, T.
Observatoire aquitain des sciences de l'univers [OASU]
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
Université Sciences et Technologies - Bordeaux 1 [UB]
Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
< Réduire
Observatoire aquitain des sciences de l'univers [OASU]
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
Université Sciences et Technologies - Bordeaux 1 [UB]
Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
Langue
en
Article de revue
Ce document a été publié dans
Astronomy and Astrophysics - A&A. 2010, vol. 518, p. L151
EDP Sciences
Résumé en anglais
We have obtained the first continuous disk averaged spectrum of Mars from 450 to 1550 Ghz using the Herschel-SPIRE Fourier Transform Spectrometer. The spectrum was obtained at a constant resolution of 1.4 GHz across the ...Lire la suite >
We have obtained the first continuous disk averaged spectrum of Mars from 450 to 1550 Ghz using the Herschel-SPIRE Fourier Transform Spectrometer. The spectrum was obtained at a constant resolution of 1.4 GHz across the whole band. The flux from the planet is such that the instrument was operated in "bright source" mode to prevent saturation of the detectors. This was the first successful use of this mode and in this work we describe the method used for observing Mars together with a detailed discussion of the data reduction techniques required to calibrate the spectrum. We discuss the calibration accuracy obtained and describe the first comparison with surface and atmospheric models. In addition to a direct photometric measurement of the planet the spectrum contains the characteristic transitions of 12CO from J 5-4 to J 13-12 as well as numerous H2O transitions. Together these allow the comparison to global atmospheric models allowing the mean mixing ratios of water and 12CO to be investigated. We find that it is possible to match the observed depth of the absorption features in the spectrum with a fixed water mixing ratio of 1 x 10-4 and a 12CO mixing ratio of 9 x 10-4< Réduire
Mots clés en anglais
Astrophysics
Earth and Planetary Astrophysics
Origine
Importé de halUnités de recherche