Organics in comet 67P-a first comparative analysis of mass spectra from ROSINA-DFMS, COSAC and Ptolemy

被引：152

作者：

Altwegg, Kathrin ^{[1
,2
]}

Balsiger, H. ^{[1
]}

Berthelier, J. J. ^{[3
]}

Bieler, A. ^{[1
]}

Calmonte, U. ^{[1
]}

Fuselier, S. A. ^{[4
,5
]}

Goesmann, F. ^{[6
]}

Gasc, S. ^{[1
]}

Gombosi, T. I. ^{[7
]}

Le Roy, L. ^{[1
]}

de Keyser, J. ^{[8
]}

Morse, A. ^{[9
]}

Rubin, M. ^{[1
]}

Schuhmann, M. ^{[1
]}

Taylor, M. G. G. T. ^{[10
]}

Tzou, C. -Y. ^{[1
]}

Wright, I. ^{[9
]}

机构：

[1] Univ Bern, Inst Phys, Sidlerstr 5, CH-3012 Bern, Switzerland

[2] Univ Bern, Ctr Space & Habitabil, Sidlerstr 5, CH-3012 Bern, Switzerland

[3] LATMOS, 4 Ave Neptune, F-94100 St Maur, France

[4] Southwest Res Inst, Space Sci Div, 6220 Culebra Rd, San Antonio, TX 78228 USA

[5] Univ Texas San Antonio, 1 UTSA Circle, San Antonio, TX 78249 USA

[6] Max Planck Inst Solar Syst Res, Justus von Liebig Weg 3, D-37077 Gottingen, Germany

[7] Univ Michigan, Dept Atmospher Ocean & Space Sci, 2455 Hayward, Ann Arbor, MI 48109 USA

[8] Belgian Inst Space Aeron, BIRA IASB, Ringlaan 3, B-1180 Brussels, Belgium

[9] Open Univ, Dept Phys Sci, Walton Hall, Milton Keynes MK7 6AA, Bucks, England

[10] European Space Agcy, European Space Res & Technol Ctr, Sci Support Off, NL-2201 AZ Noordwijk, Netherlands

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2017年 / 469卷

基金：

英国科学技术设施理事会; 瑞士国家科学基金会;

关键词：

comets: general; comets: individual: 67P/Churyumov-Gerasimenko; 67P/CHURYUMOV-GERASIMENKO; HALLEY; SPECTROMETER;

D O I：

10.1093/mnras/stx1415

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The ESA Rosetta spacecraft followed comet 67P at a close distance for more than 2 yr. In addition, it deployed the lander Philae on to the surface of the comet. The (surface) composition of the comet is of great interest to understand the origin and evolution of comets. By combining measurements made on the comet itself and in the coma, we probe the nature of this surface material and compare it to remote sensing observations. We compare data from the double focusing mass spectrometer (DFMS) of the ROSINA experiment on ESA's Rosetta mission and previously published data from the two mass spectrometers COSAC (COmetary Sampling And Composition) and Ptolemy on the lander. The mass spectra of all three instruments show very similar patterns of mainly CHO-bearing molecules that sublimate at temperatures of 275 K. The DFMS data also show a great variety of CH-, CHN-, CHS-, CHO2- and CHNO-bearing saturated and unsaturated species. Methyl isocyanate, propanal and glycol aldehyde suggested by the earlier analysis of the measured COSAC spectrum could not be confirmed. The presence of polyoxymethylene in the Ptolemy spectrum was found to be unlikely. However, the signature of the aromatic compound toluene was identified in DFMS and Ptolemy data. Comparison with remote sensing instruments confirms the complex nature of the organics on the surface of 67P, which is much more diverse than anticipated.

引用

页码：S130 / S141

页数：12

共 29 条

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