Skip to main content
SearchLoginLogin or Signup

Constraining the Origins of SO₂ and NaCl on Europa Using Global Spatially Resolved Mid-UV Observations from HST/STIS

Presentation #504.02 in the session Galilean Satellites: Scratching the Surface (Oral Presentation)

Published onOct 23, 2023
Constraining the Origins of SO₂ and NaCl on Europa Using Global Spatially Resolved Mid-UV Observations from HST/STIS

Disentangling potential endogenic species from exogenic radiolytic products is crucial for understanding the surface composition of Europa and constraining its subsurface chemistry. To constrain the origins of Europa’s two mid-UV absorption features, we present global, spatially resolved mid-UV (200-300 nm) spectra of Europa obtained with the Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS). We map both the 280 nm feature attributed to SO2 and the recently discovered 230 nm feature attributed to NaCl across the trailing, leading, anti-Jovian, and sub-Jovian hemispheres. With an adequate spatial resolution to differentiate resurfaced large-scale chaos terrain from the background radiolytic processing patterns, we assess the correlation between these species and geologically young surface regions to constrain whether the species reflect an endogenic contribution or a purely radiolytic origin resulting from the bombardment of Jovian magnetospheric particles.

Comments
0
comment
No comments here