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Observational constraints on the distribution and temperature dependence of H_2O_2 on the surface of Europa

Trumbo, S. K. and Brown, M. E. and Hand, K. P. and de Kleer, K. (2018) Observational constraints on the distribution and temperature dependence of H_2O_2 on the surface of Europa. In: European Planetary Science Congress 2018, 16-21 September 2018, Berlin, Germany.

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We use Keck NIRSPEC to investigate the geographic distribution of hydrogen peroxide, a potentially biologically important oxidant, on the surface of Europa. Contrary to expectation, we see the highest abundances at low latitudes, potentially correlated with geologically young chaos terrain. We also use NASA IRTF SpeX spectra of Europa before and after eclipse to investigate the extent to which temperature controls equilibrium hydrogen peroxide concentrations on the surface. During eclipse, Europa's surface temperature falls 10-20 K. If temperature were a significant control on peroxide concentrations, then the hydrogen peroxide band strengths should be different pre- and post-eclipse. Ultimately, these investigations will help further our understanding of the surface, and perhaps subsurface, composition of Europa.

Item Type:Conference or Workshop Item (Paper)
Trumbo, S. K.0000-0002-0767-8901
Brown, M. E.0000-0002-8255-0545
Hand, K. P.0000-0002-3225-9426
de Kleer, K.0000-0002-9068-3428
Alternate Title:Observational constraints on the distribution and temperature dependence of H2O2 on the surface of Europa
Additional Information:© Author(s) 2018. S. K. Trumbo is supported through a NASA Earth and Space Sciences Fellowship (NESSF). K. de Kleer is supported via the 51 Pegasi b Fellowship Program.
Group:Astronomy Department
Funding AgencyGrant Number
NASA Earth and Space Science FellowshipUNSPECIFIED
Heising-Simons Foundation51 Pegasi b Fellowship
Record Number:CaltechAUTHORS:20190424-155510319
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:94951
Deposited By: George Porter
Deposited On:24 Apr 2019 23:08
Last Modified:20 Apr 2020 08:47

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