Matches in SemOpenAlex for { <https://semopenalex.org/work/W4308484771> ?p ?o ?g. }
- W4308484771 abstract "Abstract We explore the parameter space for the contribution to Callisto's H corona observed by the Hubble Space Telescope from sublimated H 2 O and radiolytically produced H 2 using the Direct Simulation Monte Carlo method. The spatial morphology of this corona produced via photoelectron and magnetospheric electron‐impact‐induced dissociation is described by tracking the motion of and simulating collisions between the hot H atoms and thermal molecules including a near‐surface O 2 component. Our results indicate that sublimated H 2 O produced from the surface ice, whether assumed to be intimately mixed with or distinctly segregated from the dark nonice or ice‐poor regolith, cannot explain the observed structure of the H corona. On the other hand, a global H 2 component can reproduce the observation, and is also capable of producing the enhanced electron densities observed at high altitudes by Galileo 's plasma‐wave instrument, providing the first evidence of H 2 in Callisto's atmosphere. The range of H 2 surface densities explored, under a variety of conditions, that are consistent with these observations is ∼(0.4–1) × 10 8 cm −3 . The simulated H 2 escape rates and estimated lifetimes suggest that Callisto has a neutral H 2 torus. We also place a rough upper limit on the peak H 2 O number density (≲10 8 cm −3 ), column density (≲10 15 cm −2 ), and sublimation flux (≲10 12 cm −2 s −1 ), all of which are 1–2 orders of magnitude less than that assumed in previous models. Finally, we discuss the implications of these results, as well as how they compare to Europa and Ganymede." @default.
- W4308484771 created "2022-11-12" @default.
- W4308484771 creator A5011616954 @default.
- W4308484771 creator A5023029666 @default.
- W4308484771 creator A5029991320 @default.
- W4308484771 creator A5038365626 @default.
- W4308484771 creator A5040011832 @default.
- W4308484771 creator A5048439051 @default.
- W4308484771 creator A5063367178 @default.
- W4308484771 creator A5067889579 @default.
- W4308484771 creator A5069982936 @default.
- W4308484771 creator A5077887209 @default.
- W4308484771 creator A5080499966 @default.
- W4308484771 date "2022-11-01" @default.
- W4308484771 modified "2023-10-17" @default.
- W4308484771 title "Callisto's Atmosphere: First Evidence for H<sub>2</sub> and Constraints on H<sub>2</sub>O" @default.
- W4308484771 cites W1140843620 @default.
- W4308484771 cites W1966755528 @default.
- W4308484771 cites W1968792283 @default.
- W4308484771 cites W1971553683 @default.
- W4308484771 cites W1972535873 @default.
- W4308484771 cites W1976377087 @default.
- W4308484771 cites W1977536424 @default.
- W4308484771 cites W1978179321 @default.
- W4308484771 cites W1981250692 @default.
- W4308484771 cites W1982330607 @default.
- W4308484771 cites W1983025269 @default.
- W4308484771 cites W1984409678 @default.
- W4308484771 cites W1984993877 @default.
- W4308484771 cites W1985051648 @default.
- W4308484771 cites W1989239122 @default.
- W4308484771 cites W1991028833 @default.
- W4308484771 cites W1991102815 @default.
- W4308484771 cites W1992459679 @default.
- W4308484771 cites W1994595154 @default.
- W4308484771 cites W1996199893 @default.
- W4308484771 cites W1996503878 @default.
- W4308484771 cites W1997214776 @default.
- W4308484771 cites W1999044682 @default.
- W4308484771 cites W2001680687 @default.
- W4308484771 cites W2004991034 @default.
- W4308484771 cites W2005291725 @default.
- W4308484771 cites W2006305068 @default.
- W4308484771 cites W2012645158 @default.
- W4308484771 cites W2016807877 @default.
- W4308484771 cites W2021767482 @default.
- W4308484771 cites W2023546176 @default.
- W4308484771 cites W2027059457 @default.
- W4308484771 cites W2027838421 @default.
- W4308484771 cites W2028548927 @default.
- W4308484771 cites W2032676287 @default.
- W4308484771 cites W2034245705 @default.
- W4308484771 cites W2040317613 @default.
- W4308484771 cites W2044096523 @default.
- W4308484771 cites W2046120183 @default.
- W4308484771 cites W2051402268 @default.
- W4308484771 cites W2052596987 @default.
- W4308484771 cites W2054647437 @default.
- W4308484771 cites W2055898152 @default.
- W4308484771 cites W2059951007 @default.
- W4308484771 cites W2066328871 @default.
- W4308484771 cites W2066408781 @default.
- W4308484771 cites W2066883656 @default.
- W4308484771 cites W2068926395 @default.
- W4308484771 cites W2076757140 @default.
- W4308484771 cites W2078438145 @default.
- W4308484771 cites W2079095269 @default.
- W4308484771 cites W2086045304 @default.
- W4308484771 cites W2087545923 @default.
- W4308484771 cites W2091077750 @default.
- W4308484771 cites W2092404271 @default.
- W4308484771 cites W2115393607 @default.
- W4308484771 cites W2119032654 @default.
- W4308484771 cites W2141788374 @default.
- W4308484771 cites W2149005275 @default.
- W4308484771 cites W2158995349 @default.
- W4308484771 cites W2165722783 @default.
- W4308484771 cites W2165778743 @default.
- W4308484771 cites W2173767227 @default.
- W4308484771 cites W2328209823 @default.
- W4308484771 cites W2518835143 @default.
- W4308484771 cites W2519204569 @default.
- W4308484771 cites W2524057186 @default.
- W4308484771 cites W2575360824 @default.
- W4308484771 cites W2594446720 @default.
- W4308484771 cites W2609816414 @default.
- W4308484771 cites W2616694846 @default.
- W4308484771 cites W2750754551 @default.
- W4308484771 cites W2766348640 @default.
- W4308484771 cites W2774355297 @default.
- W4308484771 cites W2787089987 @default.
- W4308484771 cites W2791248902 @default.
- W4308484771 cites W2798893443 @default.
- W4308484771 cites W2908174297 @default.
- W4308484771 cites W2914849516 @default.
- W4308484771 cites W2969253974 @default.
- W4308484771 cites W3039304235 @default.
- W4308484771 cites W3094321439 @default.
- W4308484771 cites W3099267633 @default.
- W4308484771 cites W3112032698 @default.