Summer fireworks on comet 67P

被引：120

作者：

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

A'Hearn, M. F. ^{[2
]}

Lin, Z. -Y. ^{[3
]}

El-Maarry, M. R. ^{[4
]}

Pajola, M. ^{[5
,6
]}

Sierks, H. ^{[1
]}

Barbieri, C. ^{[7
]}

Lamy, P. L. ^{[8
]}

Rodrigo, R. ^{[9
,10
]}

Koschny, D. ^{[11
]}

Rickman, H. ^{[12
,13
]}

Keller, H. U. ^{[14
]}

Agarwal, J. ^{[1
]}

Barucci, M. A. ^{[15
]}

Bertaux, J. -L. ^{[16
]}

Bertini, I. ^{[6
]}

Besse, S. ^{[17
]}

Bodewits, D. ^{[2
]}

Cremonese, G. ^{[18
]}

Da Deppo, V. ^{[19
]}

Davidsson, B. ^{[20
]}

Debei, S. ^{[21
]}

De Cecco, M. ^{[22
]}

Deller, J. ^{[1
]}

Fornasier, S. ^{[15
]}

Fulle, M. ^{[23
]}

Gicquel, A. ^{[1
]}

Groussin, O. ^{[8
]}

Gutierrez, P. J. ^{[24
]}

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

Guettler, C. ^{[1
]}

Hoefner, S. ^{[1
,14
]}

Hofmann, M. ^{[1
]}

Hviid, S. F. ^{[25
]}

Ip, W. -H. ^{[3
,26
]}

Jorda, L. ^{[8
]}

Knollenberg, J. ^{[25
]}

Kovacs, G. ^{[1
,27
]}

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

Kuehrt, E. ^{[25
]}

Kueppers, M. ^{[17
]}

Lara, L. M. ^{[24
]}

Lazzarin, M. ^{[7
]}

Lopez Moreno, J. J. ^{[24
]}

Marzari, F. ^{[7
]}

Massironi, M. ^{[28
]}

Mottola, S. ^{[25
]}

Naletto, G. ^{[6
,19
,29
]}

Oklay, N. ^{[1
]}

Preusker, F. ^{[25
]}

机构：

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

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

[3] Natl Cent Univ, Inst Astron, Chungli 32054, Taiwan

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

[5] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA

[6] Univ Padua, Ctr Ateneo Studi Attivita Spaziali Giuseppe Colom, Via Venezia 15, I-35131 Padua, Italy

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

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

[9] CSIC, ESA, ESAC, Ctr Astrobiol,INTA, POB 78, E-28691 Madrid, Spain

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

[11] European Space Agcy, Sci Support Off, NL-2201 Noordwijk, Netherlands

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

[13] Uppsala Univ, Dept Phys & Astron, Box 516, SE-75120 Uppsala, Sweden

[14] TU Braunschweig, Inst Geophys & Extraterr Phys, D-38106 Braunschweig, Germany

[15] Univ Paris Diderot, UPMC Univ Paris 06, CNRS, LESIA,Observat Paris, 5 Pl J Janssen, F-92195 Meudon Pricipal, France

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

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

[18] INAF Osservat Astron Padova, Vicolo Osservat 5, I-35122 Padua, Italy

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

[20] NASA, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA

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

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

[23] INAF Osservat Astron Trieste, Via Tiepolo 11, I-34143 Trieste, Italy

[24] CSIC, Inst Astrofis Andalucia, Glorieta Astron, E-18008 Granada, Spain

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

[26] Macau Univ Sci & Technol, Space Sci Inst, Macau, Peoples R China

[27] Budapest Univ Technol & Econ, Dept Mechatron Opt & Engn Informat, Muegyet Rkp 3, Budapest, Hungary

[28] Univ Padua, Dipartimiento Geosci, Via Granedigo 6, I-35131 Padua, Italy

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

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

来源：

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

关键词：

comets:; individual:; 67P/Churyumov-Gerasimenko; SIZE-FREQUENCY DISTRIBUTION; SOUTHERN-HEMISPHERE; 9P/TEMPEL; DUST JETS; 67P/CHURYUMOV-GERASIMENKO; ROSETTA/OSIRIS; MORPHOLOGY; OUTBURSTS; IMAGES; MODEL;

D O I：

10.1093/mnras/stw2409

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

During its 2 yr mission around comet 67P/Churyumov-Gerasimenko, ESA's Rosetta spacecraft had the unique opportunity to follow closely a comet in the most active part of its orbit. Many studies have presented the typical features associated with the activity of the nucleus, such as localized dust and gas jets. Here, we report on series of more energetic transient events observed during the 3 months surrounding the comet's perihelion passage in 2015 August. We detected and characterized 34 outbursts with the Rosetta cameras, one every 2.4 nucleus rotations. We identified three main dust plume morphologies associated with these events: a narrow jet, a broad fan, and more complex plumes featuring both previous types together. These plumes are comparable in scale and temporal variation to what has been observed on other comets. We present a map of the outbursts' source locations, and discuss the associated topography. We find that the spatial distribution sources on the nucleus correlate well with morphological region boundaries, especially in areas marked by steep scarps or cliffs. Outbursts occur either in the early morning or shortly after the local noon, indicating two potential processes: morning outbursts may be triggered by thermal stresses linked to the rapid change of temperature; afternoon events are most likely related to the diurnal or seasonal heat wave reaching volatiles buried under the first surface layer. In addition, we propose that some events can be the result of a completely different mechanism, in which most of the dust is released upon the collapse of a cliff.

引用

页码：S184 / S194

页数：11

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