Investigating the physical properties of outbursts on comet 67P/Churyumov-Gerasimenko

被引：33

作者：

Lin, Zhong-Yi ^{[1
]}

Knollenberg, J. ^{[2
]}

Vincent, J. -B. ^{[2
]}

A'Hearn, M. F. ^{[3
]}

Ip, W-H. ^{[1
,4
,5
]}

Sierks, H. ^{[6
]}

Barbieri, C. ^{[7
,8
]}

Lamy, P. L. ^{[9
,10
]}

Rodrigo, R. ^{[11
,12
]}

Koschny, D. ^{[3
,13
]}

Rickman, H. ^{[14
]}

Keller, H. U. ^{[15
]}

Mottola, S. ^{[2
]}

Bodewits, D.

Agarwal, J. ^{[6
]}

Barucci, M. A. ^{[16
]}

Bertaux, J. -L. ^{[17
]}

Bertini, I. ^{[7
]}

Cremonese, G. ^{[18
]}

Deller, J. ^{[6
]}

Da Deppo, V. ^{[19
]}

Davidsson, B. ^{[20
]}

Debei, S. ^{[21
]}

De Cecco, M. ^{[22
]}

Fornasier, S. ^{[16
]}

Fulle, M. ^{[23
]}

Groussin, O. ^{[9
,10
]}

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

Guettler, C. ^{[6
]}

Hofmann, M. ^{[6
]}

Hviid, S. F. ^{[2
]}

Jorda, L. ^{[9
,10
]}

Kovacs, G. ^{[6
]}

Kramm, J. -R. ^{[6
]}

Kuehrt, E. ^{[2
]}

Kuppers, M. ^{[11
]}

Lai, I. -L. ^{[5
]}

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

Lazzarin, M. ^{[8
]}

Lee, J-C. ^{[25
]}

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

Marzari, F. ^{[7
]}

Naletto, G. ^{[26
]}

Oklay, N. ^{[2
,6
]}

Ott, T. ^{[27
]}

Drolshagen, E. ^{[27
]}

Shi, X. ^{[6
]}

Thomas, N. ^{[28
]}

Tubiana, C. ^{[6
]}

机构：

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

[2] Inst Planetenforsch, Deuisch Zentrum Luft & Raumfahri DLR, Rutherfordstr 2, D-12489 Berlin, Germany

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

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

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

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

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

[8] Univ Padua, Ctr Ateneo Studi & Attivita Spaziali Giuseppe Col, Via Venezia 15, I-35131 Padua, Italy

[9] CNRS, Lab Astrophys Marseille, UMR 7326, 38 Rue Frederic Joliot Curie, F-13388 Marseille, France

[10] Aix Marseille Univ, 38 Rue Frederic Joliot Curie, F-13388 Marseille, France

[11] CSIC, INTA, Ctr Astrobiol, ESA,ESAC, POB 78,E 8691, Madrid, Spain

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

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

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

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

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

[17] UVSQ, LATMOS, CNRS, IPSL, 11 Blvd dAlembert, F-78280 Guyancourt, France

[18] INAF, Osservatorio Astron Padova, Vic Osservatorio 5, I-35122 Padua, Italy

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

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

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

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

[25] Natl Cent Univ, Dept Earth Sci, Chungli 32054, Taiwan

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

[27] Carl von Ossietzky Univ Oldenburg, Ammerlander Heerstr 114, D-26111 Oldenburg, Germany

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

来源：

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

关键词：

comets:; individual:; 67P/Churyumov-Gerasimenko; DEEP-IMPACT; DUST; SURFACE;

D O I：

10.1093/mnras/stx2768

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Cometary outbursts on several comets have been observed both by ground-based telescopes and by in situ instruments on spacecraft. However, the mechanism behind these phenomena and their physical properties are still unclear. The optical, spectrocopic and infrared remote imaging system (OSIRIS) onboard the Rosetta spacecraft provided first-hand information on the outbursts from comet 67P/Churyumov-Gerasimenko during its perihelion passage in 2015. The physical properties of the outbursts can be investigated by examining the time series of these high-resolution images. An analysis is made of the wide- and narrow-angle images obtained during the monitoring of the outburst sequences, which occurred between July and September in 2015. A ring-masking technique is used to calculate the excess brightness of the outbursts. The ejected mass and expansion velocity of the outbursts is estimated from differences in images made with the same filter (orange filter). The calculated excess brightness from these outburst plumes ranges from a few per cent to 28 per cent. In some major outbursts, the brightness contribution from the outburst plume can be one or two times higher than that of the typical coma jet activities. The strongest event was the perihelion outburst detected just a few hours before perihelion. The mass ejection rate during a generic outburst could reach a few per cent of the steady-state value of the dust coma. Transient events are detected by studying the brightness slope of the outburst plume with continuous streams of outflowing gas and dust triggered by driving mechanisms, as yet not understood, which remain active for several minutes to less than a few hours.

引用

页码：S731 / S740

页数：10

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