A 3D parallel model of Ganymede's exosphere

A 3D parallelmodel ofGanymede’sexosphereA 3D parallel model of Ganymede’s exosphereL. Leclercq, L.Turc, F. Leblanc,R. ModoloGanymede’sexosphereThe modelLudivine Leclercq 1 , François Leblanc 2 , Ronan Modolo 1 ,Lucile Turc 3ResultsConclusion andperspectives1 Université Versailles Saint Quentin, LATMOS, IPSL-CNRS, France2 Université Pierre et Marie Curie, LATMOS, IPSL-CNRS, France3 LPP, Ecole Polytechnique-CNRS-UPMC, FranceAtelier pôle système solaire avril 2013

Our understanding of Ganymede’s exosphereCreation of exospheric particlesA 3D parallelmodel ofGanymede’sexosphereL. Leclercq, L.Turc, F. Leblanc,R. ModoloGanymede’sexosphereThe modelResultsConclusion andperspectivesCredits : X.Jia and M.Kivelson

Our understanding of Ganymede’s exosphereComposition and structureA 3D parallelmodel ofGanymede’sexosphereL. Leclercq, L.Turc, F. Leblanc,R. ModoloGanymede’sexosphereThe modelResultsConclusion andperspectivesCredits : X.Jia and M.Kivelson

Our understanding of Ganymede’s exosphereComposition and structureA 3D parallelmodel ofGanymede’sexosphereL. Leclercq, L.Turc, F. Leblanc,R. ModoloGanymede’sexosphereThe modelResultsConclusion andperspectivesCredits : X.Jia and M.Kivelson

Our understanding of Ganymede’s exosphereComposition and structureA 3D parallelmodel ofGanymede’sexosphereL. Leclercq, L.Turc, F. Leblanc,R. ModoloGanymede’sexosphereThe modelResultsConclusion andperspectivesCredits : X.Jia and M.Kivelson

Density profiles SSL=10°(subsolar region)A 3D parallelmodel ofGanymede’sexosphereL. Leclercq, L.Turc, F. Leblanc,R. ModoloGanymede’sexosphereThe modelResultsConclusion andperspectives

Density profiles SSL=90°(polar region)A 3D parallelmodel ofGanymede’sexosphereL. Leclercq, L.Turc, F. Leblanc,R. ModoloGanymede’sexosphereThe modelResultsConclusion andperspectives

Density of H 2 OA 3D parallelmodel ofGanymede’sexosphereL. Leclercq, L.Turc, F. Leblanc,R. ModoloGanymede’sexosphereThe modelResultsConclusion andperspectivesH 2 O density in the subsolar/antisolar plane (left panel) and theterminator plane (right panel)

Collisions of H 2 OA 3D parallelmodel ofGanymede’sexosphereL. Leclercq, L.Turc, F. Leblanc,R. ModoloGanymede’sexosphereThe modelResultsConclusion andperspectives⇒ Ganymede presents a local atmosphere in the subsolar region

Collisions of H 2 OA 3D parallelmodel ofGanymede’sexosphereL. Leclercq, L.Turc, F. Leblanc,R. ModoloGanymede’sexosphereThe modelResultsConclusion andperspectives

JUICE local density during GCO 200 km phaseA 3D parallelmodel ofGanymede’sexosphereL. Leclercq, L.Turc, F. Leblanc,R. ModoloGanymede’sexosphereThe modelResultsConclusion andperspectives

In the shadow of JupiterA 3D parallelmodel ofGanymede’sexosphereL. Leclercq, L.Turc, F. Leblanc,R. ModoloGanymede’sexosphereThe modelResultsConclusion andperspectives

Conclusion◮ Results are consistent with results of Marconi’s model (2007).◮ Results are also consistent with observations of HST andGalileo spacecraft.PerspectivesTo couple with a magnetospheric model.A 3D parallelmodel ofGanymede’sexosphereL. Leclercq, L.Turc, F. Leblanc,R. ModoloGanymede’sexosphereThe modelResultsConclusion andperspectives

ParallelizationA 3D parallelmodel ofGanymede’sexosphereL. Leclercq, L.Turc, F. Leblanc,R. ModoloGanymede’sexosphereThe modelResultsConclusion andperspectives

Photodissociation and photo-ionizationReaction Rate (in s −1 ) Excess energy (eV)1 H+hν → H + +e 4.5×10 −9 3.82 H2+hν → H+H 8.8×10 −9 2.23 H2+hν → H + 2 +e 3.1×10−9 6.94 H2+hν → H+H + +e 6.9×10 −10 265 O+hν → O + +e 1.5×10 −8 246 OH+hν → O+H 9.7×10 −7 3.47 OH+hν → OH + +e 1.6×10 −8 228 H 2 O+hν → H+OH 5.7×10 −7 3.49 H 2 O+hν → H 2 +O 3.8×10 −8 3.410 H 2 O+hν → H+H+O 4.9×10 −8 4.611 H 2 O+hν → H+OH + +e 3.8×10 −9 2112 H 2 O+hν → H 2 +O + +e 5.2×10 −10 3813 H 2 O+hν → OH+H + +e 10 −9 2814 H 2 O+hν → H 2 O + +e 2.1×10 −8 1415 O 2 +hν → O+O 2×10 −7 1.316 O 2 +hν → O + 2 +e 3×10−8 1817 O 2 +hν → O+O + +e 8.4×10 −9 26A 3D parallelmodel ofGanymede’sexosphereL. Leclercq, L.Turc, F. Leblanc,R. ModoloGanymede’sexosphereThe modelResultsConclusion andperspectives

Electron impactA 3D parallelmodel ofGanymede’sexosphereReaction Rate (in cm 3 s −1 ) Excess energy (eV)18 H+e → H + +e+e 9.1×10 −8 3.819 H 2 +e → H+H+e 9.6×10 −9 4.620 H 2 +e → H + 2 +e+e 1.6×10−8 6.921 H 2 +e → H + +H+e+e 9.6×10 −10 2622 O+e → O + +H+e+e 2×10 −8 2423 OH+e → O+H+e 1.2×10 −8 3.424 OH+e → OH + +e 2.8×10 −8 2225 H 2 O+e → OH+H+e 3.7×10 −8 3.426 H 2 O+e → H 2 +O+e 1.6×10 −8 3.427 H 2 O+e → OH+H + +e+e 4.3×10 −9 2828 H 2 O+e → H+OH + +e+e 4×10 −9 2129 H 2 O+e → H 2 +O + +e+e 7.1×10 −9 3830 H 2 O+e → H 2 O + +e+e 2.1×10 −8 1431 O 2 +e → O+O+e 1.3×10 −8 1.332 O 2 +e → O + 2 +e+e 2×10−8 1.833 O 2 +e → O+O + +e+e 1.1×10 −8 26L. Leclercq, L.Turc, F. Leblanc,R. ModoloGanymede’sexosphereThe modelResultsConclusion andperspectives