Pitted Terrain on Vesta and Implications for the Presence of Volatiles

被引：82

作者：

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. ^{[3
,5
]}

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. ^{[4
,12
]}

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
]}

机构：

[1] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA

[2] Ist Nazl Astrofis, Ist Astrofis & Planetol Spaziali, Rome, Italy

[3] Planetary Sci Inst, Tucson, AZ USA

[4] Max Planck Inst Solar Syst Res, Katlenburg Lindau, Germany

[5] Univ Maryland, College Pk, MD 20742 USA

[6] NASA, Lunar Sci Inst, Boulder, CO USA

[7] Smithsonian Inst, Natl Museum Nat Hist, Washington, DC 20560 USA

[8] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[9] Brown Univ, Providence, RI 02912 USA

[10] Deutsch Zentrum Luft & Raumfahrt DLR, Inst Planetary Res, Berlin, Germany

[11] CALTECH, Jet Prop Lab, Pasadena, CA USA

[12] Univ N Dakota, Grand Forks, ND 58201 USA

[13] Univ Calif Los Angeles, Los Angeles, CA USA

[14] Lunar & Planetary Inst, Houston, TX 77058 USA

[15] Arizona State Univ, Tempe, AZ USA

[16] SW Res Inst, San Antonio, TX USA

来源：

SCIENCE | 2012年 / 338卷 / 6104期

关键词：

CARBONACEOUS CHONDRITES; ASTEROID; 4-VESTA; CERES; DAWN; MARS;

D O I：

10.1126/science.1225374

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We investigated the origin of unusual pitted terrain on asteroid Vesta, revealed in images from the Dawn spacecraft. Pitted terrain is characterized by irregular rimless depressions found in and around several impact craters, with a distinct morphology not observed on other airless bodies. Similar terrain is associated with numerous martian craters, where pits are thought to form through degassing of volatile-bearing material heated by the impact. Pitted terrain on Vesta may have formed in a similar manner, which indicates that portions of the surface contain a relatively large volatile component. Exogenic materials, such as water-rich carbonaceous chondrites, may be the source of volatiles, suggesting that impactor materials are preserved locally in relatively high abundance on Vesta and that impactor composition has played an important role in shaping the asteroid's geology.

引用

页码：246 / 249

页数：4

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