Pitted Terrain on Vesta and Implications for the Presence of Volatiles-Reference-Cited by-同舟云学术

Pitted Terrain on Vesta and Implications for the Presence of Volatiles

Published:2012-10-12 Issue:6104 Volume:338 Page:246-249
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Denevi B. W.¹,Blewett D. T.¹,Buczkowski D. L.¹,Capaccioni F.²,Capria M. T.²,De Sanctis M. C.²,Garry W. B.³,Gaskell R. W.³,Le Corre L.⁴,Li J.-Y.³⁵,Marchi S.⁶,McCoy T. J.⁷,Nathues A.⁴,O’Brien D. P.³,Petro N. E.⁸,Pieters C. M.⁹,Preusker F.¹⁰,Raymond C. A.¹¹,Reddy V.⁴¹²,Russell C. T.¹³,Schenk P.¹⁴,Scully J. E. C.¹³,Sunshine J. M.⁵,Tosi F.²,Williams D. A.¹⁵,Wyrick D.¹⁶

Affiliation:

1. The Johns Hopkins University Applied Physics Laboratory, Laurel, MD, USA.

2. Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, Rome, Italy.

3. Planetary Science Institute, Tucson, AZ, USA.

4. Max Planck Institute for Solar System Research, Katlenburg-Lindau, Germany.

5. University of Maryland, College Park, MD, USA.

6. NASA Lunar Science Institute, Boulder, CO, USA.

7. National Museum of Natural History, Smithsonian Institution, Washington, DC, USA.

8. NASA Goddard Space Flight Center, Greenbelt, MD, USA.

9. Brown University, Providence, RI, USA.

10. Deutsches Zentrum fur Luft- und Raumfahrt (DLR), Institute of Planetary Research, Berlin, Germany.

11. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA.

12. University of North Dakota, Grand Forks, ND, USA.

13. University of California, Los Angeles, CA, USA.

14. Lunar and Planetary Institute, Houston, TX, USA.

15. Arizona State University, Tempe, AZ, USA.

16. Southwest Research Institute, San Antonio, TX, USA.

Abstract

Vesta to the Core Vesta is one of the largest bodies in the main asteroid belt. Unlike most other asteroids, which are fragments of once larger bodies, Vesta is thought to have survived as a protoplanet since its formation at the beginning of the solar system (see the Perspective by Binzel , published online 20 September). Based on data obtained with the Gamma Ray and Neutron Detector aboard the Dawn spacecraft, Prettyman et al. (p. 242 , published online 20 September) show that Vesta's reputed volatile-poor regolith contains substantial amounts of hydrogen delivered by carbonaceous chondrite impactors. Observations of pitted terrain on Vesta obtained by Dawn's Framing Camera and analyzed by Denevi et al. (p. 246 , published online 20 September), provide evidence for degassing of volatiles and hence the presence of hydrated materials. Finally, paleomagnetic studies by Fu et al. (p. 238 ) on a meteorite originating from Vesta suggest that magnetic fields existed on the surface of the asteroid 3.7 billion years ago, supporting the past existence of a magnetic core dynamo.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference33 articles.

1. The Dawn Mission to Vesta and Ceres

2. The Dawn Framing Camera

3. The Violent Collisional History of Asteroid 4 Vesta

4. Characterizing and navigating small bodies with imaging data

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