Are fractured cliffs the source of cometary dust jets? Insights from OSIRIS/Rosetta at 67P/Churyumov-Gerasimenko

被引：113

作者：

Vincent, J. -B. ^{[1
]}

Oklay, N. ^{[1
]}

Pajola, M. ^{[2
]}

Hoefner, S. ^{[1
,3
]}

Sierks, H. ^{[1
]}

Hu, X. ^{[1
,3
]}

Barbieri, C. ^{[4
]}

Lamy, P. L. ^{[5
]}

Rodrigo, R. ^{[6
,7
]}

Koschny, D. ^{[8
]}

Rickman, H. ^{[9
,10
]}

Keller, H. U. ^{[3
]}

A'Hearn, M. F. ^{[1
,11
,12
]}

Barucci, M. A. ^{[13
]}

Bertaux, J. -L. ^{[14
]}

Bertini, I. ^{[2
]}

Besse, S. ^{[8
]}

Bodewits, D. ^{[11
]}

Cremonese, G. ^{[15
]}

Da Deppo, V. ^{[16
]}

Davidsson, B. ^{[9
]}

Debei, S. ^{[17
]}

De Cecco, M. ^{[18
]}

El-Maarry, M. R. ^{[19
]}

Fornasier, S. ^{[13
]}

Fulle, M. ^{[20
]}

Groussin, O. ^{[5
]}

Gutierrez, P. J. ^{[21
]}

Gutierrez-Marquez, P. ^{[1
]}

Guettler, C. ^{[1
]}

Hofmann, M. ^{[1
]}

Hviid, S. F. ^{[22
]}

Ip, W-H ^{[23
]}

Jordan, L. ^{[5
]}

Knollenberg, J. ^{[22
]}

Kovacs, G. ^{[1
,24
]}

Kramm, J. -R. ^{[1
]}

Kuehrt, E. ^{[22
]}

Kueppers, M. ^{[25
]}

Lara, L. M. ^{[21
]}

Lazzarin, M. ^{[4
]}

Lin, Z. -Y. ^{[23
]}

Lopez Moreno, J. J. ^{[21
]}

Lowry, S. ^{[26
]}

Marzari, F. ^{[4
]}

Massironi, M. ^{[2
]}

Moreno, F. ^{[21
]}

Mottola, S. ^{[22
]}

Naletto, G. ^{[2
,16
,27
]}

Preusker, F. ^{[22
]}

机构：

[1] Max Planck Inst Sonnensyst Forsch, Justus von Liebig Weg 3, D-37077 Gottingen, Germany

[2] Univ Padua, CISAS, Via Venezia 15, I-35131 Padua, Italy

[3] Tech Univ Carolo Wilhelmina Braunschweig, Inst Geophys & Extraterr Phys, D-38106 Braunschweig, Germany

[4] Univ Padua, Dept Phys & Astron G Galilei, Vic Osservatorio 3, I-35122 Padua, Italy

[5] Aix Marseille Univ, CNRS, LAM, UMR 7326, F-13388 Marseille, France

[6] ESAC, ESA, Ctr Astrobiol INTA CSIC, POB 78, Madrid 28691, Spain

[7] Int Space Sci Inst, Hallerstr 6, CH-3012 Bern, Switzerland

[8] European Space Agcy, Res & Sci Support Dept, NL-2201 Noordwijk, Netherlands

[9] Uppsala Univ, Dept Phys & Astron, Box 516, S-75120 Uppsala, Sweden

[10] PAS Space Res Ctr, Bartycka 18A, PL-00716 Warsaw, Poland

[11] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[12] Gauss Prof Akad Wissensch Gottingen, D-37077 Gottingen, Germany

[13] Univ Paris Diderot, Univ Paris 06, CNRS, Observ Paris,LESIA, 5 Pl J Janssen, F-92195 Meudon, France

[14] CNRS UVSQ IPSL, LATMOS, 11 Blvd Alembert, F-78280 Guyancourt, France

[15] Osserv Astron Padova, INAF, Vicolo Osservatorio 5, I-35122 Padua, Italy

[16] CNR IFN UOS Padova LUXOR, Via Trasea 7, I-35131 Padua, Italy

[17] Univ Padua, Dept Ind Engn, Via Venezia 1, I-35131 Padua, Italy

[18] Univ Trent, Via Sommarive 9, I-38123 Trento, Italy

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

[20] Osserv Astron Trieste, INAF, Via Tiepolo 11, I-34143 Trieste, Italy

[21] CSIC, Inst Astrofis, Granada 18008, Spain

[22] DLR, Inst Planetary Res, Rutherfordstr 2, D-12489 Berlin, Germany

[23] Natl Cent Univ, Inst Space Sci, Chungli 32054, Taiwan

[24] Budapest Univ Technol & Econ, Dept Mech Opt & Engn Informat, Muegyetem Rkp 3, H-1111 Budapest, Hungary

[25] ESA ESAC, POB 78, Villanueva De La Canada 28691, Spain

[26] Univ Kent, Sch Phys Sci, Ctr Astrophys & Planetary Sci, Canterbury CT2 7NH, Kent, England

[27] Univ Padua, Dept Informat Engn, Via Gradenigo 6-B, I-35131 Padua, Italy

[28] Hungarian Acad Sci, POB 67, H-1525 Budapest, Hungary

来源：

ASTRONOMY & ASTROPHYSICS | 2016年 / 587卷

关键词：

comets: general; comets: individual: 67P/Churyumov-Gerasimenko; 9P/TEMPEL; 1; P/WILD; OSIRIS; COMA; SURFACE; MORPHOLOGY; NUCLEUS; SYSTEM; ICE; SUBLIMATION;

D O I：

10.1051/0004-6361/201527159

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. Dust jets (i.e., fuzzy collimated streams of cometary material arising from the nucleus) have been observed in situ on all comets since the Giotto mission flew by comet 1P/Halley in 1986, and yet their formation mechanism remains unknown. Several solutions have been proposed involving either specific properties of the active areas or the local topography to create and focus the gas and dust flows. While the nucleus morphology seems to be responsible for the larger features, high resolution imagery has shown that broad streams are composed of many smaller jets (a few meters wide) that connect directly to the nucleus surface. Aims. We monitored these jets at high resolution and over several months to understand what the physical processes are that drive their formation and how this affects the surface. Methods. Using many images of the same areas with different viewing angles, we performed a 3-dimensional reconstruction of collimated jets and linked them precisely to their sources on the nucleus. Results. We show here observational evidence that the northern hemisphere jets of comet 67P/Churyumov-Gerasimenko arise from areas with sharp topographic changes and describe the physical processes involved. We propose a model in which active cliffs are the main source of jet-like features and therefore of the regions eroding the fastest on comets. We suggest that this is a common mechanism taking place on all comets.

引用

页数：15

共 48 条

[1] Ancillary data services of NASA's Navigation and Ancillary Information Facility [J].

Acton, CH .

PLANETARY AND SPACE SCIENCE, 1996, 44 (01) :65-70

[2] RAPID TEMPERATURE CHANGES AND THE EARLY ACTIVITY ON COMET 67P/CHURYUMOV-GERASIMENKO [J].

Ali-Lagoa, V. ;

Delbo', M. ;

Libourel, G. .

ASTROPHYSICAL JOURNAL LETTERS, 2015, 810 (02)

[3] New estimates for the sublimation rate for ice on the Moon [J].

Andreas, Edgar L. .

ICARUS, 2007, 186 (01) :24-30

[4]

[Anonymous], 2011, Planetary Surface Processes

[5] The origin of pits on 9P/Tempel 1 and the geologic signature of outbursts in Stardust-NExT images [J].

Belton, Michael J. S. ;

Thomas, Peter ;

Carcich, Brian ;

Quick, Andrew ;

Veyerka, Joseph ;

Melosh, H. Jay ;

A'Hearn, Michael F. ;

Li, Jian-Yang ;

Brownlee, Donald ;

Schultz, Peter ;

Klaasen, Kenneth ;

Sarid, Gal .

ICARUS, 2013, 222 (02) :477-486

[6] Cometary activity, active areas, and a mechanism for collimated outflows on 1P, 9P, 19P, and 81P [J].

Belton, Michael J. S. .

ICARUS, 2010, 210 (02) :881-897

[7] Dust agglomeration [J].

Blum, Jurgen .

ADVANCES IN PHYSICS, 2006, 55 (7-8) :881-947

[8] Surface of young Jupiter family comet 81 P/Wild 2: View from the Stardust spacecraft [J].

Brownlee, DE ;

Horz, F ;

Newburn, RL ;

Zolensky, M ;

Duxbury, TC ;

Sandford, S ;

Sekanina, Z ;

Tsou, P ;

Hanner, MS ;

Clark, BC ;

Green, SF ;

Kissel, J .

SCIENCE, 2004, 304 (5678) :1764-1769

[9]

Capaccioni F., 2015, SCIENCE UNPUB

[10] Challenging a paradigm: Do we need active and inactive areas to account for near-nuclear jet activity? [J].

Crifo, JF ;

Rodionov, AV ;

Szego, K ;

Fulle, M .

EARTH MOON AND PLANETS, 2002, 90 (1-4) :227-238

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