17163
收藏Mendeley Data2024-01-31 更新2024-06-27 收录
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We propose to obtain high spatial resolution imaging polarimetry of the surface of Europa to localize features in the polarization phase curve which are diagnostic of fresh deposition comma sintering and aging comma allowing identification of regions of recent cryovolcanism and subsurface activity. We will seek a relationship between polarization and global thermal inertia maps comma and between polarization and spectroscopically distinct compositional units. Polarization and thermal inertia probe regolith porosity comma surface transparency comma composition and topography comma while spectroscopically distinct regions relate to absorbing chemical admixtures. The overall global polarization pattern will constrain the systematic ice scattering characteristics. This polarimetric suite of high-resolution HST images comma with its unique emphasis on surface physics comma will complement the wide variety of upcoming observations from major flagship missions JWST comma Europa Clipper comma JUICE and Juno as well as thermal ALMA imaging. With Europa and its global saline ocean at the forefront of strategic planning for NASA and ESA as a target of exceptional astrobiological importance comma it is essential to advance our understanding of the Europa surface to the maximum.
创建时间:
2024-01-31



