Modeling The Vapor And Dust Dynamics Due To The Impact Of The Lcross Spacecraft On The Moon

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dc.contributor.utaustinauthorGoldstein, D. B.en
dc.contributor.utaustinauthorSummy, D.en
dc.creatorGoldstein, D. B.en
dc.creatorSummy, D.en
dc.creatorColaprete, A.en
dc.creatorVarghese, P. L.en
dc.creatorTrafton, L. M.en
dc.date.accessioned2015-04-16T14:48:24Zen
dc.date.available2015-04-16T14:48:24Zen
dc.date.issued2009-12en
dc.description.abstractThe implications of possibly large volatile reservoirs on the Moon are significant for the future of manned activity there and for space science and exploration in general. In autumn of 2008 NASA will launch the LCROSS mission to impact two spacecraft into a permanently shadowed crater-a cold trap - at the south pole of the Moon. The lead spacecraft will excavate its own several meter crater. The process will be observed by the following smaller vehicle and by orbiting and Earth-based instruments in hopes of observing the release of volatiles-predominantly water -- from the lunar soil. The following vehicle will then impact as well. We examine the plausible vapor dynamics following the impacts and concentrate on the observability of the gas from Earth or lunar orbit. In the free-molecular computational model of the vapor motion, water and OH molecules move ballistically, have a temperature-dependent surface residence time, and are subject to photo-dissociation and ionization losses. Sunlight shadowing, separation of the vapor from the dust grains, dust thermodynamics and different impact plume models are considered.en
dc.description.departmentAerospace Engineeringen
dc.identifier.citationD. B. Goldstein, D. Summy, A. Colaprete, P. L. Varghese, and L. M. Trafton. AIP Conference Proceedings 1084, 1061 (Dec., 2008); doi: 10.1063/1.3076439en
dc.identifier.doi10.1063/1.3076439en
dc.identifier.issn0094-243Xen
dc.identifier.issn978-0-7354-0615-5en
dc.identifier.urihttp://hdl.handle.net/2152/29498en
dc.language.isoEnglishen
dc.relation.ispartofserialRarefied Gas Dynamicsen_US
dc.rightsAdministrative deposit of works to UT Digital Repository: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en
dc.subjectcollisionless atmosphereen
dc.subjectexosphereen
dc.subjectlunar atmosphereen
dc.subjectlunar impacten
dc.subjectlunar south-poleen
dc.subjectwater iceen
dc.subjectcold trapen
dc.subjectdepositsen
dc.subjectprospectoren
dc.subjectsearchen
dc.subjectengineering, aerospaceen
dc.subjectphysics, fluids & plasmasen
dc.titleModeling The Vapor And Dust Dynamics Due To The Impact Of The Lcross Spacecraft On The Moonen
dc.typeArticleen

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