Exposed water ice deposits on the surface of comet 9P/Tempel 1

被引：202

作者：

Sunshine, JM ^{[1
]}

A'Hearn, MF

Groussin, O

Li, JY

Belton, MJS

Delamere, WA

Kissel, J

Klaasen, KP

McFadden, LA

Meech, KJ

Melosh, HJ

Schultz, PH

Thomas, PC

Veverka, J

Yeomans, DK

Busko, IC

Desnoyer, M

Farnham, TL

Feaga, LM

Hampton, DL

Lindler, DJ

Lisse, CM

Wellnitz, DD

机构：

[1] Sci Applicat Int Corp, Chantilly, VA 20151 USA

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

[3] Belton Space Explorat Initiat, Tucson, AZ 85716 USA

[4] Delamere Support Serv, Boulder, CO 80301 USA

[5] Max Planck Inst Solar Syst Res, D-37191 Katlenburg Lindau, Germany

[6] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[7] Univ Hawaii, Honolulu, HI 96822 USA

[8] Univ Arizona, Tucson, AZ 85721 USA

[9] Brown Univ, Providence, RI USA

[10] Cornell Univ, Ithaca, NY 14853 USA

[11] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[12] Ball Aerosp & Technol Corp, Boulder, CO 80301 USA

[13] Sigma Sci, Greenbelt, MD 20771 USA

[14] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA

来源：

SCIENCE | 2006年 / 311卷 / 5766期

关键词：

D O I：

10.1126/science.1123632

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 report the direct detection of solid water ice deposits exposed on the surface of comet 9P/Tempel 1, as observed by the Deep Impact mission. Three anomalously colored areas are shown to include water ice on the basis of their near-infrared spectra, which include diagnostic water ice absorptions at wavelengths of 1.5 and 2.0 micrometers. These absorptions are well modeled as a mixture of nearby non-ice regions and 3 to 6% water ice particles 10 to 50 micrometers in diameter. These particle sizes are larger than those ejected during the impact experiment, which suggests that the surface deposits are loose aggregates. The total area of exposed water ice is substantially less than that required to support the observed ambient outgassing from the comet, which likely has additional source regions below the surface.

引用

页码：1453 / 1455

页数：3

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