HST Observations of the Martian Hydrogen and Oxygen Exosphere
Abstract
HST observations of FUV emissions from the extended atomic H and O exosphere of Mars have been performed at several epochs now, and show pronounced changes with time with relevance to the escape rate of water from the upper atmosphere. In particular, large and rapid changes in the hydrogen exosphere were observed in Fall 2007, indicative of a possible seasonal dependence in the escape rate of water. This poster will present an overview of the different observations, and the schedule for new HST observations in Fall 2014. The new visits are being planned to study a) any seasonal changes in the H and O exospheres, and b) the influence of the close passage of Comet Siding Spring in Oct. 2014.
- Publication:
-
AAS/Division for Planetary Sciences Meeting Abstracts #46
- Pub Date:
- November 2014
- Bibcode:
- 2014DPS....4641208C