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William C. Feldman
Researcher at Planetary Science Institute
Publications - 76
Citations - 3592
William C. Feldman is an academic researcher from Planetary Science Institute. The author has contributed to research in topics: Neutron & Mars Exploration Program. The author has an hindex of 29, co-authored 76 publications receiving 3156 citations. Previous affiliations of William C. Feldman include Los Alamos National Laboratory.
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Journal ArticleDOI
Dawn at Vesta: Testing the Protoplanetary Paradigm
Christopher T. Russell,Carol A. Raymond,Angioletta Coradini,Harry Y. McSween,Maria T. Zuber,Andreas Nathues,M. C. De Sanctis,Ralf Jaumann,Alex S. Konopliv,F. Preusker,Sami W. Asmar,Ryan S. Park,Robert Gaskell,H. U. Keller,Stefano Mottola,Thomas Roatsch,Jennifer E.C. Scully,David E. Smith,Pasquale Tricarico,Michael J. Toplis,Ulrich R. Christensen,William C. Feldman,David J. Lawrence,Timothy J. McCoy,Thomas H. Prettyman,Robert C. Reedy,M. E. Sykes,Timothy N. Titus +27 more
TL;DR: Dawn's results confirm predictions that Vesta differentiated and support its identification as the parent body of the HEDs, and present the mineralogical characterization of Vesta, revealing that this asteroid underwent a complex magmatic evolution that led to a differentiated crust and mantle.
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Ammoniated phyllosilicates with a likely outer Solar System origin on (1) Ceres
M. C. De Sanctis,E. Ammannito,E. Ammannito,Andrea Raponi,Simone Marchi,Simone Marchi,T. B. McCord,Harry Y. McSween,Fabrizio Capaccioni,Maria Teresa Capria,Filippo Giacomo Carrozzo,Mauro Ciarniello,Andrea Longobardo,Federico Tosi,Sergio Fonte,Michelangelo Formisano,Alessandro Frigeri,Marco Giardino,Gianfranco Magni,Ernesto Palomba,Diego Turrini,Francesca Zambon,J. P. Combe,William C. Feldman,Ralf Jaumann,Lucy A. McFadden,Carle M. Pieters,Thomas H. Prettyman,Michael J. Toplis,Carol A. Raymond,Christopher T. Russell +30 more
TL;DR: Measurements of Ceres indicate widespread ammoniated phyllosilicates across the surface, but no detectable water ice, which suggests that material from the outer Solar System was incorporated into Ceres, either during its formation at great heliocentric distance or by incorporation of material transported into the main asteroid belt.
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Evidence for water ice near the lunar poles
William C. Feldman,Sylvestre Maurice,David J. Lawrence,R. C. Little,S. L. Lawson,Olivier Gasnault,Roger C. Wiens,B. L. Barraclough,R. C. Elphic,Thomas H. Prettyman,John T. Steinberg,Alan B. Binder +11 more
TL;DR: Improved versions of Lunar Prospector thermal and epithermal neutron data were studied to help discriminate between potential delivery and retention mechanisms for hydrogen on the Moon as mentioned in this paper, and they concluded that a significant portion of the enhanced hydrogen near both poles is most likely in the form of water molecules.
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Extensive water ice within Ceres’ aqueously altered regolith: Evidence from nuclear spectroscopy
Thomas H. Prettyman,Naoyuki Yamashita,Michael J. Toplis,Harry Y. McSween,Norbert Schorghofer,Simone Marchi,William C. Feldman,Julie Castillo-Rogez,Olivier Forni,David J. Lawrence,Eleonora Ammannito,Bethany L. Ehlmann,Hanna G. Sizemore,Steve Joy,Carol A. Polanskey,Marc D. Rayman,Carol A. Raymond,Christopher T. Russell +17 more
TL;DR: Nuclear spectroscopy data acquired by NASA’s Dawn mission determined the concentrations of elemental hydrogen, iron, and potassium on Ceres, and show that surface materials were processed by the action of water within the interior, confirming theoretical predictions that ice can survive for billions of years just beneath the surface.
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Return to Mercury: A Global Perspective on MESSENGER's First Mercury Flyby
Sean C. Solomon,Ralph L. McNutt,Thomas R. Watters,David J. Lawrence,William C. Feldman,James W. Head,Stamatios M. Krimigis,Stamatios M. Krimigis,Scott L. Murchie,Roger J. Phillips,James A. Slavin,Maria T. Zuber +11 more
TL;DR: MESSENGER images confirm that lobate scarps are the dominant tectonic landform and record global contraction associated with cooling of the planet and the total contractional strain is at least one-third greater than inferred from Mariner 10 images.