Matches in SemOpenAlex for { <https://semopenalex.org/work/W2893609204> ?p ?o ?g. }
- W2893609204 endingPage "L16" @default.
- W2893609204 startingPage "L16" @default.
- W2893609204 abstract "Sodium and potassium are known to be present as neutral elements in the exosphere of Europa. The question of the origin of these alkalis—endogenous or exogenous—remains open. They have been ascribed to exogenous contamination due to volcanism from nearby Io, or the accretion of meteorites and dust. However, these mechanisms fail to fit the observed sodium-to-potassium ratio. Sodium and potassium have also been considered to originate from Europa's putative subsurface ocean, generated by past rock-water leaching. The latter scenario implies a journey of the ions and atoms throughout the ice covering Europa. This raises questions about their stability into the bulk as well as on top of ice. These questions are addressed with first principle periodic solid-state density functional theory simulations describing the relative propensities of sodium, potassium, and calcium for being trapped in the bulk. The evolution of the ionic character of these atoms is followed by means of a topological analysis as they come up to the surface of the ice crust. We find that the metals, almost totally ionized in the ice bulk (net charge ∼+0.8) where they are stabilized by ∼1 eV or more, recover a quasi-neutrality (net charge ∼+0.2) when weakly adsorbed at the surface by ∼0.15 eV. Our results are consistent with the assumption that sodium and potassium observed in Europa exosphere come from the sputtering of materials issued from the underlying ocean and exposed by resurfacing events. They also suggest that calcium should be searched for by future missions." @default.
- W2893609204 created "2018-10-05" @default.
- W2893609204 creator A5000651320 @default.
- W2893609204 creator A5013278764 @default.
- W2893609204 creator A5044125685 @default.
- W2893609204 creator A5050650346 @default.
- W2893609204 creator A5067880649 @default.
- W2893609204 creator A5076194387 @default.
- W2893609204 creator A5089157316 @default.
- W2893609204 date "2018-09-26" @default.
- W2893609204 modified "2023-09-30" @default.
- W2893609204 title "Sodium, Potassium, and Calcium in Europa: An Atomic Journey through Water Ice" @default.
- W2893609204 cites W1587396429 @default.
- W2893609204 cites W1922831774 @default.
- W2893609204 cites W1970528475 @default.
- W2893609204 cites W1978802573 @default.
- W2893609204 cites W1978940377 @default.
- W2893609204 cites W1979544533 @default.
- W2893609204 cites W2001389870 @default.
- W2893609204 cites W2004226711 @default.
- W2893609204 cites W2004261760 @default.
- W2893609204 cites W2022085321 @default.
- W2893609204 cites W2035097298 @default.
- W2893609204 cites W2048945399 @default.
- W2893609204 cites W2050151877 @default.
- W2893609204 cites W2069409503 @default.
- W2893609204 cites W2069970015 @default.
- W2893609204 cites W2072078084 @default.
- W2893609204 cites W2075275303 @default.
- W2893609204 cites W2076609619 @default.
- W2893609204 cites W2082367406 @default.
- W2893609204 cites W2083222334 @default.
- W2893609204 cites W2083401412 @default.
- W2893609204 cites W2087052283 @default.
- W2893609204 cites W2092157292 @default.
- W2893609204 cites W2096471541 @default.
- W2893609204 cites W2117894566 @default.
- W2893609204 cites W2148941593 @default.
- W2893609204 cites W2163663953 @default.
- W2893609204 cites W2580067963 @default.
- W2893609204 cites W2749058141 @default.
- W2893609204 cites W2771143556 @default.
- W2893609204 cites W2899497983 @default.
- W2893609204 cites W3105866347 @default.
- W2893609204 cites W3106110749 @default.
- W2893609204 doi "https://doi.org/10.3847/2041-8213/aae091" @default.
- W2893609204 hasPublicationYear "2018" @default.
- W2893609204 type Work @default.
- W2893609204 sameAs 2893609204 @default.
- W2893609204 citedByCount "5" @default.
- W2893609204 countsByYear W28936092042019 @default.
- W2893609204 countsByYear W28936092042020 @default.
- W2893609204 countsByYear W28936092042022 @default.
- W2893609204 crossrefType "journal-article" @default.
- W2893609204 hasAuthorship W2893609204A5000651320 @default.
- W2893609204 hasAuthorship W2893609204A5013278764 @default.
- W2893609204 hasAuthorship W2893609204A5044125685 @default.
- W2893609204 hasAuthorship W2893609204A5050650346 @default.
- W2893609204 hasAuthorship W2893609204A5067880649 @default.
- W2893609204 hasAuthorship W2893609204A5076194387 @default.
- W2893609204 hasAuthorship W2893609204A5089157316 @default.
- W2893609204 hasBestOaLocation W28936092041 @default.
- W2893609204 hasConcept C121332964 @default.
- W2893609204 hasConcept C130635790 @default.
- W2893609204 hasConcept C145148216 @default.
- W2893609204 hasConcept C159467904 @default.
- W2893609204 hasConcept C178790620 @default.
- W2893609204 hasConcept C185592680 @default.
- W2893609204 hasConcept C517785266 @default.
- W2893609204 hasConcept C537181965 @default.
- W2893609204 hasConcept C62520636 @default.
- W2893609204 hasConcept C87355193 @default.
- W2893609204 hasConcept C99521031 @default.
- W2893609204 hasConceptScore W2893609204C121332964 @default.
- W2893609204 hasConceptScore W2893609204C130635790 @default.
- W2893609204 hasConceptScore W2893609204C145148216 @default.
- W2893609204 hasConceptScore W2893609204C159467904 @default.
- W2893609204 hasConceptScore W2893609204C178790620 @default.
- W2893609204 hasConceptScore W2893609204C185592680 @default.
- W2893609204 hasConceptScore W2893609204C517785266 @default.
- W2893609204 hasConceptScore W2893609204C537181965 @default.
- W2893609204 hasConceptScore W2893609204C62520636 @default.
- W2893609204 hasConceptScore W2893609204C87355193 @default.
- W2893609204 hasConceptScore W2893609204C99521031 @default.
- W2893609204 hasIssue "2" @default.
- W2893609204 hasLocation W28936092041 @default.
- W2893609204 hasOpenAccess W2893609204 @default.
- W2893609204 hasPrimaryLocation W28936092041 @default.
- W2893609204 hasRelatedWork W107497612 @default.
- W2893609204 hasRelatedWork W19657594 @default.
- W2893609204 hasRelatedWork W2045143363 @default.
- W2893609204 hasRelatedWork W2075312088 @default.
- W2893609204 hasRelatedWork W2076196490 @default.
- W2893609204 hasRelatedWork W208006737 @default.
- W2893609204 hasRelatedWork W2101307180 @default.
- W2893609204 hasRelatedWork W2143952493 @default.
- W2893609204 hasRelatedWork W2161183667 @default.
- W2893609204 hasRelatedWork W3176952581 @default.