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Conference Papers Year : 2018

Mapping D/H on Mars using EXES aboard SOFIA

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Abstract

The D/H ratio on Mars, on a global scale, is an important measurement for understanding the past history of water on Mars [1]. Locally, through condensation and sublima- tion processes, it is a possible tracer of the sources and sinks of the Martian water vapor [2]. We have used EXES (Echelon Cross Echelle Spectrograph) aboard SOFIA (Strato- spheric Observatory for Infrared Astronomy) to map the D/H ratio on Mars by measuring simul- taneously H 2 O, HDO and CO 2 transitions in the thermal infrared (7.2 μm and 7.5 μm). We find no evidence for strong local nor seasonal vari- ations of the D/H ratio.
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Dates and versions

hal-03803338 , version 1 (29-11-2022)

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Thérèse Encrenaz, S. Aoki, Curtis N. Dewitt, Matthew J. Richter, Thomas K. Greathouse, et al.. Mapping D/H on Mars using EXES aboard SOFIA. MARS SCIENCE Workshop ``From Mars Express to Exomars ́ ́, Feb 2018, Madrid, Spain. ⟨hal-03803338⟩
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