ISAS Space Science Colloquium & Space Science Seminar
NASA's MAVEN Mission to Mars:Discoveries from the Imaging Ultraviolet Spectrograph
Laboratory for Atmospheric & Space Physics, U. Colorado
The Imaging UltraViolet Spectrograph (IUVS) is the sole planetary remote sensing instrument on the Mars Atmosphere and Volatile Evolution mission(MAVEN). Although many past Mars missions have carried UV spectrographs, IUVS has many new and unique capabilities which have enabled unexpected discoveries. New insights span every region of the Mars atmosphere, from polar ozone near the surface to escaping hydrogen many planetary radii away. In between, IUVS offers new insights on cloud formation, meteor ablation, nightglow, waves & tides, Mars D/H and long-term atmospheric evolution. One of the most profound sets of discoveries relates to auroral processes on Mars. Aurora were expected to differ from Earth's due to Mars' lack of a global magnetic field, but surprising IUVS results are offering a new paradigm for stellar influences on non-magnetized planets. This paradigm shift could have implications beyond the solar system for billions of extrasolar planets which may or may not have global magnetic fields.
Place: 2F Conf. room / 研究管理棟２階会議場（1236号室）