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Communication Dans Un Congrès Année : 2018

Highlights from Imaging Ultraviolet Spectroscopy of the Mars Atmosphere with MAVEN/IUVS

Franck Montmessin
Franck Lefèvre
Hannes Gröller
  • Fonction : Auteur
Jean-Yves Chaufray
J. Scott Evans
  • Fonction : Auteur

Résumé

The Mars Atmosphere and Volatile EvolutioN (MAVEN) mission's Imaging Ultraviolet Spectrograph (IUVS) observes Mars in the far and mid ultraviolet (110-340 nm), investigating lower and upper atmospheric structure and indirectly probing neutral atmospheric escape. The instrument is among the most powerful spectrographs sent to another planet, with several key capabilities: separate Far-UV & Mid-UV channels for stray light control; a high-resolution echelle mode to resolve deuterium and hydrogen emission; internal instrument pointing and scanning capabilities to allow complete mapping and nearly continuous operation; and optimization for airglow studies. After two Earth years in orbit (one Mars year), IUVS has assembled a large quantity of data and provided insights on present-day processes at Mars including dayglow, nightglow, aurora, meteor showers, clouds, and solar-planetary interactions. In this presentation, we will highlight key results obtained by IUVS, including: (1) mapping of thermospheric composition, structure, and variability; (2) long-term tracking of H escape, O escape, and D/H ratios, and (3) detection and mapping of diffuse auroral emission. We will present an overview of these results and a discussion of their implications for understanding Mars atmospheric dynamics and evolution.
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Dates et versions

insu-04393518 , version 1 (14-01-2024)

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Citer

Michael Chaffin, Matteo Crismani, William Mcclintock, Michael Stevens, Ian Stewart, et al.. Highlights from Imaging Ultraviolet Spectroscopy of the Mars Atmosphere with MAVEN/IUVS. 42nd COSPAR Scientific Assembly, Jul 2018, Pasadena (California), United States. ⟨insu-04393518⟩
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