Search Results - "PRETTYMAN, T. H"

Extensive water ice within Ceres’ aqueously altered regolith: Evidence from nuclear spectroscopy by Prettyman, T. H., Yamashita, N., Toplis, M. J., McSween, H. Y., Schörghofer, N., Marchi, S., Feldman, W. C., Castillo-Rogez, J., Forni, O., Lawrence, D. J., Ammannito, E., Ehlmann, B. L., Sizemore, H. G., Joy, S. P., Polanskey, C. A., Rayman, M. D., Raymond, C. A., Russell, C. T.

“…The surface elemental composition of dwarf planet Ceres constrains its regolith ice content, aqueous alteration processes, and interior evolution. Using…”
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Elemental composition of the lunar surface: Analysis of gamma ray spectroscopy data from Lunar Prospector by Prettyman, T. H., Hagerty, J. J., Elphic, R. C., Feldman, W. C., Lawrence, D. J., McKinney, G. W., Vaniman, D. T.

“…Gamma ray spectroscopy data acquired by Lunar Prospector are used to determine global maps of the elemental composition of the lunar surface. Maps of the…”
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Dawn arrives at Ceres: Exploration of a small, volatile-rich world by Russell, C. T., Raymond, C. A., Ammannito, E., Buczkowski, D. L., De Santis, M. C., Hiesinger, H., Jaumann, R., Konopliv, A. S., McSween, H. Y., Nathues, A., Park, R. S., Pieters, C. M., Prettyman, T. H., McCord, T. B., McFadden, L. A., Mottola, S., Zuber, M. T., Joy, S. P., Polanskey, C., Rayman, M. D., Castillo-Rogez, J. C., Chi, P. J., Combe, J. P., Ermakov, A., Fu, R. R., Hoffmann, M., Jia, Y. D., King, S. D., Lawrence, D. J., Li, J.-Y., Marchi, S., Preusker, F., Roatsch, T., Ruesch, O., Schenk, P., Villarreal, M. N., Yamashita, N.

“…On 6 March 2015, Dawn arrived at Ceres to find a dark, desiccated surface punctuated by small, bright areas. Parts of Ceres' surface are heavily cratered, but…”
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Pitted terrains on (1) Ceres and implications for shallow subsurface volatile distribution by Sizemore, H. G., Platz, T., Schorghofer, N., Prettyman, T. H., De Sanctis, M. C., Crown, D. A., Schmedemann, N., Neesemann, A., Kneissl, T., Marchi, S., Schenk, P. M., Bland, M. T., Schmidt, B. E., Hughson, K. H. G., Tosi, F., Zambon, F., Mest, S. C., Yingst, R. A., Williams, D. A., Russell, C. T., Raymond, C. A.

“…Prior to the arrival of the Dawn spacecraft at Ceres, the dwarf planet was anticipated to be ice‐rich. Searches for morphological features related to ice have…”
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Dawn at Vesta: Testing the Protoplanetary Paradigm by Russell, C. T., Raymond, C. A., Coradini, A., McSween, H. Y., Zuber, M. T., Nathues, A., De Sanctis, M. C., Jaumann, R., Konopliv, A. S., Preusker, F., Asmar, S. W., Park, R. S., Gaskell, R., Keller, H. U., Mottola, S., Roatsch, T., Scully, J. E. C., Smith, D. E., Tricarico, P., Toplis, M. J., Christensen, U. R., Feldman, W. C., Lawrence, D. J., McCoy, T. J., Prettyman, T. H., Reedy, R. C., Sykes, M. E., Titus, T. N.

“…The Dawn spacecraft targeted 4 Vesta, believed to be a remnant intact protoplanet from the earliest epoch of solar system formation, based on analyses of…”
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Global Distribution of Neutrons from Mars: Results from Mars Odyssey by Feldman, W. C., Boynton, W. V., Tokar, R. L., Prettyman, T. H., Gasnault, O., Squyres, S. W., Elphic, R. C., Lawrence, D. J., Lawson, S. L., Maurice, S., McKinney, G. W., Moore, K. R., Reedy, R. C.

“…Global distributions of thermal, epithermal, and fast neutron fluxes have been mapped during late southern summer/northern winter using the Mars Odyssey…”
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Global distribution of near-surface hydrogen on Mars by Feldman, W. C., Prettyman, T. H., Maurice, S., Plaut, J. J., Bish, D. L., Vaniman, D. T., Mellon, M. T., Metzger, A. E., Squyres, S. W., Karunatillake, S., Boynton, W. V., Elphic, R. C., Funsten, H. O., Lawrence, D. J., Tokar, R. L.

“…Neutron data observed using the Neutron Spectrometer aboard 2001 Mars Odyssey provide a lower limit to the global inventory of Martian water‐equivalent…”
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Impact-driven mobilization of deep crustal brines on dwarf planet Ceres by Raymond, C. A., Ermakov, A. I., Castillo-Rogez, J. C., Marchi, S., Johnson, B. C., Hesse, M. A., Scully, J. E. C., Buczkowski, D. L., Sizemore, H. G., Schenk, P. M., Nathues, A., Park, R. S., Prettyman, T. H., Quick, L. C., Keane, J. T., Rayman, M. D., Russell, C. T.

“…Ceres, the only dwarf planet in the inner Solar System, appears to be a relict ocean world. Data collected by NASA's Dawn spacecraft provided evidence that…”
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Chondritic models of 4 Vesta: Implications for geochemical and geophysical properties by Toplis, M. J., Mizzon, H., Monnereau, M., Forni, O., McSween, H. Y., Mittlefehldt, D. W., McCoy, T. J., Prettyman, T. H., De Sanctis, M. C., Raymond, C. A., Russell, C. T.

“…Simple mass‐balance and thermodynamic constraints are used to illustrate the potential geochemical and geophysical diversity of a fully differentiated…”
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Distribution of Hydrogen in the near Surface of Mars: Evidence for Subsurface Ice Deposits by Boynton, W. V., Feldman, W. C., Squyres, S. W., Prettyman, T. H., Brückner, J., Evans, L. G., Reedy, R. C., Starr, R., Arnold, J. R., Drake, D. M., Englert, P. A. J., Metzger, A. E., Mitrofanov, Igor, Trombka, J. I., d'Uston, C., Wänke, H., Gasnault, O., Hamara, D. K., Janes, D. M., Marcialis, R. L., Maurice, S., Mikheeva, I., Taylor, G. J., Tokar, R., Shinohara, C.

“…Using the Gamma-Ray Spectrometer on the Mars Odyssey, we have identified two regions near the poles that are enriched in hydrogen. The data indicate the…”
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Vesta's Shape and Morphology by Jaumann, R., Williams, D. A., Buczkowski, D. L., Yingst, R. A., Preusker, F., Hiesinger, H., Schmedemann, N., Kneissl, T., Vincent, J. B., Blewett, D. T., Buratti, B. J., Carsenty, U., Denevi, B. W., De Sanctis, M. C., Garry, W. B., Keller, H. U., Kersten, E., Krohn, K., Li, J.-Y., Marchi, S., Matz, K. D., McCord, T. B., McSween, H. Y., Mest, S. C., Mittlefehldt, D. W., Mottola, S., Nathues, A., Neukum, G., O'Brien, D. P., Pieters, C. M., Prettyman, T. H., Raymond, C. A., Roatsch, T., Russell, C. T., Schenk, P., Schmidt, B. E., Scholten, F., Stephan, K., Sykes, M. V., Tricarico, P., Wagner, R., Zuber, M. T., Sierks, H.

“…Vesta's surface is characterized by abundant impact craters, some with preserved ejecta blankets, large troughs extending around the equatorial region,…”
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MCNPX benchmark for cosmic ray interactions with the Moon by McKinney, G. W., Lawrence, D. J., Prettyman, T. H., Elphic, R. C., Feldman, W. C., Hagerty, J. J.

“…The MCNPX radiation transport code is used to simulate cosmic ray interactions within the Moon. Accurate source, geometric, and physics models are developed to…”
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Evidence for water ice near the lunar poles by Feldman, W. C., Maurice, S., Lawrence, D. J., Little, R. C., Lawson, S. L., Gasnault, O., Wiens, R. C., Barraclough, B. L., Elphic, R. C., Prettyman, T. H., Steinberg, J. T., Binder, A. B.

“…Improved versions of Lunar Prospector thermal and epithermal neutron data were studied to help discriminate between potential delivery and retention mechanisms…”
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Vesta, vestoids, and the HED meteorites: Interconnections and differences based on Dawn Framing Camera observations by Buratti, B. J., Dalba, P. A., Hicks, M. D., Reddy, V., Sykes, M. V., McCord, T. B., O'Brien, D. P., Pieters, C. M., Prettyman, T. H., McFadden, L. A., Nathues, Andreas, Le Corre, Lucille, Marchi, S., Raymond, Carol, Russell, Chris

“…The Framing Camera (FC) on the Dawn spacecraft provided the first view of 4 Vesta at sufficiently high spatial resolution to enable a detailed correlation of…”
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Small-area thorium features on the lunar surface by Lawrence, D. J., Elphic, R. C., Feldman, W. C., Prettyman, T. H., Gasnault, O., Maurice, S.

“…Using an improved understanding of the Lunar Prospector Gamma‐Ray Spectrometer (LP‐GRS) spatial footprint, we have derived a new map of global thorium…”
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Distribution of iron on Vesta by Yamashita, N., Prettyman, T. H., Mittlefehldt, D. W., Toplis, M. J., McCoy, T. J., Beck, A. W., Reedy, R. C., Feldman, W. C., Lawrence, D. J., Peplowski, P. N., Forni, O., Mizzon, H., Raymond, C. A., Russell, C. T.

“…We have completed a mapping study of 7.6 MeV gamma rays produced by neutron capture by Fe at the surface of the main belt asteroid 4 Vesta as measured by the…”
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A Probabilistic Approach to Determination of Ceres' Average Surface Composition From Dawn Visible‐Infrared Mapping Spectrometer and Gamma Ray and Neutron Detector Data by Kurokawa, H., Ehlmann, B. L., De Sanctis, M. C., Lapôtre, M. G. A., Usui, T., Stein, N. T., Prettyman, T. H., Raponi, A., Ciarniello, M.

“…The Visible‐Infrared Mapping Spectrometer (VIR) on board the Dawn spacecraft revealed that aqueous secondary minerals—Mg‐phyllosilicates, NH4‐bearing phases,…”
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Improved modeling of Lunar Prospector neutron spectrometer data: Implications for hydrogen deposits at the lunar poles by Lawrence, David J., Feldman, W. C., Elphic, R. C., Hagerty, J. J., Maurice, S., McKinney, G. W., Prettyman, T. H.

“…New models have been computed for the Lunar Prospector (LP) thermal and epithermal neutron counting rates using the particle transport code MCNPX. This work…”
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Global spatial deconvolution of Lunar Prospector Th abundances by Lawrence, D. J., Puetter, R. C., Elphic, R. C., Feldman, W. C., Hagerty, J. J., Prettyman, T. H., Spudis, P. D.

“…We have completed the first global spatial deconvolution analysis of planetary gamma‐ray data for lunar Th abundances as measured by the Lunar Prospector…”
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Dawn completes its mission at 4 Vesta by Russell, C. T., Raymond, C. A., Jaumann, R., McSween, H. Y., De Sanctis, M. C., Nathues, A., Prettyman, T. H., Ammannito, E., Reddy, V., Preusker, F., O'Brien, D. P., Marchi, S., Denevi, B. W., Buczkowski, D. L., Pieters, C. M., McCord, T. B., Li, J.-Y., Mittlefehldt, D. W., Combe, J.-P., Williams, D. A., Hiesinger, H., Yingst, R. A., Polanskey, C. A., Joy, S. P.

“…The Dawn mission was designed to test our hypothesis about the origin and evolution of the early solar system by visiting the largest differentiated basaltic…”
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