Unexpected and significant findings in comet 67P/Churyumov-Gerasimenko: an interdisciplinary view

被引：55

作者：

Fulle, Marco ^{[1
]}

Altobelli, N. ^{[2
]}

Buratti, B. ^{[3
]}

Choukroun, M. ^{[3
]}

Fulchignoni, M. ^{[4
]}

Gruen, E. ^{[5
]}

Taylor, M. G. G. T. ^{[6
]}

Weissman, P. ^{[7
]}

机构：

[1] INAF Osservatorio Astron, Via Tiepolo 11, I-34143 Trieste, Italy

[2] ESA, Camino Bajo Castillo S-N, E-28692 Madrid, Spain

[3] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA

[4] Univ Paris Diderot, Univ Pierre & Marie Curie, CNRS, LESIA Observat Paris, F-92195 Meudon, France

[5] Max Planck Inst Kernphys, Saupfercheckweg 1, D-69117 Heidelberg, Germany

[6] European Space Agcy, European Space Res & Technol Ctr, Keplerlaan 1, NL-2201 AZ Noordwijk, Netherlands

[7] Planetary Sci Inst, 1700 East Ft Lowell,Suite 106, Tucson, AZ 85719 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2016年 / 462卷

关键词：

space vehicles; comets: general; comets: individual: 67P/Churyumov; Gerasimenko; WATER ICE; SIZE DISTRIBUTION; DUST MANTLE; SHAPE MODEL; NUCLEUS; PARTICLES; GIOTTO; GAS; SIMULATION; EROSION;

D O I：

10.1093/mnras/stw1663

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

ESA's Rosetta Mission has followed Comet 67P/Churyumov-Gerasimenko from 3.6 au inbound to 3.6 au outbound. Many results are largely unexpected, as compared to previous models based on in situ and ground-based observations of Jupiter-family comets. The main topics discussed in this review are (1) the importance of the large concavities characterizing the 67P nucleus, that, (2) coupled to the nucleus obliquity, make seasons an unexpectedly important source of many phenomena observed in this and probably in most comets; (3) the mostly uniform distribution of ices over the nucleus surface; (4) the high dust-to-water mass ratio, which implies that much of the nucleus mass is in the form of minerals partly coming from the inner proto-solar nebula, thus making 67P very porous and less hydrated than primitive CI chondrites. 67P nucleus may have never experienced any collision at speeds larger than 1 m s(-1).

引用

页码：S2 / S8

页数：7

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