Elemental Mapping by Dawn Reveals Exogenic H in Vesta's Regolith

Using Dawn's Gamma Ray and Neutron Detector, we tested models of Vesta's evolution based on studies of howardite, eucrite, and diogenite (HED) meteorites. Global Fe/O and Fe/Si ratios are consistent with HED compositions. Neutron measurements confirm that a thick, diogenitic lower crust is...

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Veröffentlicht in:	Science (American Association for the Advancement of Science) 2012-10, Vol.338 (6104), p.242-246
Hauptverfasser:	Prettyman, Thomas H., Mittlefehldt, David W., Yamashita, Naoyuki, Lawrence, David J., Beck, Andrew W., Feldman, William C., McCoy, Timothy J., McSween, Harry Y., Toplis, Michael J., Titus, Timothy N., Tricarico, Pasquale, Reedy, Robert C., Hendricks, John S., Forni, Olivier, Le Corre, Lucille, Li, Jian-Yang, Mizzon, Hugau, Reddy, Vishnu, Raymond, Carol A., Russell, Christopher T.
Format:	Artikel
Sprache:	eng
Schlagworte:	Albedo Asteroids Asteroids (minor planets) Astronomy Chemical composition Chondrites Earth, ocean, space Exact sciences and technology Fragments Gamma rays Hydrogen Impact craters Individualized Instruction Magnetic fields Meteors & meteorites Neutrons Online Planetary science Planetary, asteroid, and satellite characteristics and properties Planets, their satellites and rings. Asteroids Pyroxenes Regolith Solar system Space exploration Star & galaxy formation Vesta asteroid VOCs Volatile organic compounds
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