The organic-rich surface of comet 67P/Churyumov-Gerasimenko as seen by VIRTIS/Rosetta

被引：296

作者：

Capaccioni, F. ^{[1
]}

Coradini, A. ^{[1
]}

Filacchione, G. ^{[1
]}

Erard, S. ^{[2
]}

Arnold, G. ^{[3
]}

Drossart, P. ^{[2
]}

De Sanctis, M. C. ^{[1
]}

Bockelee-Morvan, D. ^{[2
]}

Capria, M. T. ^{[1
]}

Tosi, F. ^{[1
]}

Leyrat, C. ^{[2
]}

Schmitt, B. ^{[4
]}

Quirico, E. ^{[4
]}

Cerroni, P. ^{[1
]}

Mennella, V. ^{[5
]}

Raponi, A. ^{[1
]}

Ciarniello, M. ^{[1
]}

McCord, T. ^{[6
]}

Moroz, L. ^{[3
]}

Palomba, E. ^{[1
]}

Ammannito, E. ^{[7
]}

Barucci, M. A. ^{[2
]}

Bellucci, G. ^{[1
]}

Benkhoff, J. ^{[8
]}

Bibring, J. P. ^{[9
]}

Blanco, A. ^{[10
]}

Blecka, M. ^{[11
]}

Carlson, R. ^{[12
]}

Carsenty, U. ^{[3
]}

Colangeli, L. ^{[8
]}

Combes, M. ^{[2
]}

Combi, M. ^{[13
]}

Crovisier, J. ^{[2
]}

Encrenaz, T. ^{[2
]}

Federico, C. ^{[14
]}

Fink, U. ^{[15
]}

Fonti, S. ^{[10
]}

Ip, W. H. ^{[16
]}

Irwin, P. ^{[17
]}

Jaumann, R. ^{[3
,18
]}

Kuehrt, E. ^{[3
]}

Langevin, Y. ^{[9
]}

Magni, G. ^{[1
]}

Mottola, S. ^{[3
]}

Orofino, V. ^{[10
]}

Palumbo, P. ^{[19
]}

Piccioni, G.

Schade, U. ^{[20
]}

Taylor, F. ^{[17
]}

Tiphene, D. ^{[2
]}

机构：

[1] Ist Nazl Astrofis INAF, Ist Astrofis & Planetol Spaziali, Rome, Italy

[2] Univ Paris Diderot, Univ Paris 06, Lab Etud Spatiales & Instrumentat Astrophys, Observ Paris,CNRS, Meudon, France

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

[4] Univ Grenoble Alpes, CNRS, Inst Planetol & Astrophys Grenoble, Grenoble, France

[5] Osserv Astron Capodimonte, INAF, I-80131 Naples, Italy

[6] Bear Fight Inst, Winthrop, WA 98862 USA

[7] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[8] European Space Agcy ESA, European Space Res & Technol Ctr ESTEC, Noordwijk, Netherlands

[9] CNRS, Inst Astrophys Spatial, F-91405 Orsay, France

[10] Univ Salento, Dipartimento Matemat & Fis Ennio De Giorgi, Lecce, Italy

[11] Polish Acad Sci, Ctr Space Res, Warsaw, Poland

[12] NASA, Jet Prop Lab, Pasadena, CA 91109 USA

[13] Univ Michigan, Space Phys Res Lab, Ann Arbor, MI 48109 USA

[14] Univ Perugia, I-06100 Perugia, Italy

[15] Univ Arizona, Lunar Planetary Lab, Tucson, AZ 85721 USA

[16] Natl Cent Univ, Taipei, Taiwan

[17] Univ Oxford, Dept Phys, Oxford, England

[18] Free Univ Berlin, Inst Geosci, D-12249 Berlin, Germany

[19] Univ Parthenope, Naples, Italy

[20] Helmholtz Zentrum Berlin Mat & Energie, Berlin, Germany

[21] Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy

[22] Agenzia Spaziale Italiana, Rome, Italy

[23] Univ Maryland, Inst Phys Sci & Technol, College Pk, MD 20742 USA

[24] CNR, Ist Radioastron, INAF, I-40126 Bologna, Italy

[25] DLR, Inst Opt Sensorsyst, Berlin, Germany

来源：

SCIENCE | 2015年 / 347卷 / 6220期

基金：

英国科学技术设施理事会;

关键词：

SPECTRAL REFLECTANCE PROPERTIES; CARBONACEOUS CHONDRITES; WATER ICE; MICROMETEORITES; SPECTROSCOPY; 81P/WILD-2; NUCLEUS; ANALOGS; MATTER; SNOW;

D O I：

10.1126/science.aaa0628

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：

The VIRTIS (Visible, Infrared and Thermal Imaging Spectrometer) instrument on board the Rosetta spacecraft has provided evidence of carbon-bearing compounds on the nucleus of the comet 67P/Churyumov-Gerasimenko. The very low reflectance of the nucleus (normal albedo of 0.060 +/- 0.003 at 0.55 micrometers), the spectral slopes in visible and infrared ranges (5 to 25 and 1.5 to 5% k angstrom(-1)), and the broad absorption feature in the 2.9-to-3.6-micrometer range present across the entire illuminated surface are compatible with opaque minerals associated with nonvolatile organic macromolecular materials: a complex mixture of various types of carbon-hydrogen and/or oxygen-hydrogen chemical groups, with little contribution of nitrogen-hydrogen groups. In active areas, the changes in spectral slope and absorption feature width may suggest small amounts of water-ice. However, no ice-rich patches are observed, indicating a generally dehydrated nature for the surface currently illuminated by the Sun.

引用

页数：4

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