Physical properties and dynamical relation of the circular depressions on comet 67P/Churyumov-Gerasimenko

被引：23

作者：

Ip, W. -H. ^{[1
,2
,3
]}

Lai, I. -L. ^{[2
]}

Lee, J. -C. ^{[4
]}

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

Li, Y. ^{[3
]}

Lin, Z. -Y. ^{[1
]}

Vincent, J. -B. ^{[5
]}

Besse, S. ^{[6
]}

Sierks, H. ^{[5
]}

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

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

Rodrigo, R. ^{[10
,11
]}

Koschny, D. ^{[6
]}

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

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

Agarwal, J. ^{[5
]}

A'Hearn, M. F. ^{[15
]}

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

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

Bertini, I. ^{[8
]}

Bodewits, D. ^{[15
]}

Boudreault, S. ^{[5
]}

Cremonese, G. ^{[18
]}

Da Deppo, V. ^{[19
]}

Davidsson, B. ^{[12
]}

Debei, S. ^{[20
]}

De Cecco, M. ^{[21
]}

El-Maarry, M. R. ^{[22
]}

Fornasier, S. ^{[16
]}

Fulle, M. ^{[23
]}

Groussin, O. ^{[9
]}

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

Guettler, C. ^{[5
]}

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

Jorda, L. ^{[9
]}

Knollenberg, J. ^{[25
]}

Kovacs, G. ^{[5
]}

Kramm, J. -R. ^{[5
]}

Kuehrt, E. ^{[25
]}

Kuppers, M. ^{[26
]}

La Forgia, F. ^{[7
]}

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

Lazzarin, M. ^{[7
]}

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

Lowry, S. ^{[27
]}

Marchi, S. ^{[28
]}

Marzari, F. ^{[7
]}

Michalik, H. ^{[14
]}

Mottola, S. ^{[25
]}

Naletto, G. ^{[8
,19
,29
]}

机构：

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

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

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

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

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

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

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

[10] Ctr Astrobiol INTA CSIC, Madrid, Spain

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

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

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

[14] Tech Univ Carolo Wilhelmina Braunschweig, IGEP, D-38106 Braunschweig, Germany

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

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

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

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

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

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

[21] Univ Trento, Via Sommar 9, I-38123 Trento, Italy

[22] Univ Bern, Phys Inst, CH-3012 Bern, Switzerland

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

[24] Inst Astrofis Andalucia CSIC, Granada 18008, Spain

[25] Deutsch Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch, Rutherfordstr 2, D-12489 Berlin, Germany

[26] ESAC, POB 78, Madrid 28691, Spain

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

[28] Southwest Res Inst, Boulder, CO USA

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

[30] MTA CSFK Konkoly Observ, H-1121 Budapest, Hungary

来源：

ASTRONOMY & ASTROPHYSICS | 2016年 / 591卷

关键词：

comets:; individual:; 67P/Churyumov-Gerasimenko; JUPITER-FAMILY COMETS; DUST JETS; MORPHOLOGY; SURFACE; OUTBURSTS; NUCLEUS; DENSITY; ORIGIN; MODEL; SHAPE;

D O I：

10.1051/0004-6361/201628156

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Aims. We aim to characterize the circular depressions of comet 67P/Churyumov-Gerasimenko and investigate whether such surface morphology of a comet nucleus is related to the cumulative sublimation effect since becoming a Jupiter family comet (JFC). Methods. The images from the Rosetta/OSIRIS science camera experiment are used to construct size frequency distributions of the circular depression structures on comet 67P and they are compared with those of the JFCs 81P/Wild 2, 9P/Tempel 1, and 103P/Hartley 2. The orbital evolutionary histories of these comets over the past 100 000 yr are analyzed statistically and compared with each other. Results. The global distribution of the circular depressions over the surface of 67P is charted and classified. Descriptions are given to the characteristics and cumulative size frequency distribution of the identified features. Orbital statistics of the JFCs visited by spacecraft are derived. Conclusions. The size frequency distribution of the circular depressions is found to have a similar power law distribution to those of 9P/Tempel 1 and 81P/Wild 2. This might imply that they could have been generated by the same process. Orbital integration calculation shows that the surface erosion histories of 81P/Wild 2, and 9P/Tempel 1 could be shorter than those of 67P, 103 P/Hartley 2 and 19P/Borrelly. From this point of view, the circular depressions could be dated back to the pre-JFC phase or the transneptunian phase of these comets. The north-south asymmetry in the distribution of the circular depressions could be associated with the heterogeneous structure of the nucleus of comet 67P and/or the solar insolation history.

引用

页数：10

共 42 条

[1] EPOXI at Comet Hartley 2 [J].