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Quantitative analysis of isolated boulder fields on comet 67P/Churyumov-Gerasimenko

Cambianica, P. and Cremonese, G. and Naletto, G. and Lucchetti, A. and Pajola, M. and Penasa, L. and Simioni, E. and Massironi, M. and Ferrari, S. and Bodewits, D. and La Forgia, F. and Sierks, H. and Lamy, P. L. and Rodrigo, R. and Koschny, D. and Davidsson, B. and Barucci, M. A. and Bertaux, J.-L. and Bertini, I. and Da Deppo, V. and Debei, S. and De Cecco, M. and Deller, J. and Fornasier, S. and Fulle, M. and Gutiérrez, P. J. and Güttler, C. and Ip, W.-H. and Keller, H. U. and Lara, L. M. and Lazzari, M. and Lin, Z.-Y. and López-Moreno, J. J. and Marzari, F. and Mottola, S. and Shi, X. and Scholten, F. and Toth, I. and Tubiana, C. and Vincent, J.-B. (2019) Quantitative analysis of isolated boulder fields on comet 67P/Churyumov-Gerasimenko. Astronomy & Astrophysics, 630, A15. EDP Sciences. DOI: 10.1051/0004-6361/201834775 ISSN 0004-6361

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1051/0004-6361/201834775

Abstract

Aims. We provide a detailed quantitative analysis of isolated boulder fields situated in three different regions of comet 67P/Churyumov-Gerasimenko: Imhotep, Hapi, and Hatmehit. This is done to supply a useful method for analyzing the morphology of the boulders and to characterize the regions themselves. Methods. We used OSIRIS Narrow Angle Camera images with a spatial scale smaller than 2mpx and analyzed the size-frequency distribution and the cumulative fractional area per boulder population. In addition, we correlated shape parameters, such as circularity and solidity, with both the spatial and the size-frequency distribution of the three populations. Results. We identified 11 811 boulders in the Imhotep, Hapi, and Hatmehit regions. We found that the Hatmehit and Imhotep areas show power indices in the range of -2.3/-2.7. These values could represent a transition between gravitational events caused by thermal weathering and sublimation, and material formed during collapses that has undergone sublimation. The Hapi area is characterized by a lower power index (-1.2/-1.7), suggesting that those boulders have a different origin. They can be the result of material formed during gravitational events and collapses that has undergone continuous fragmentation. We calculated the cumulative fractional area (CFA) in order to investigate how the area is covered by boulders as a function of their sizes. The Hatmehit and Imhotep regions show a CFA that is well fit by a power law. In contrast, the Hapi area does not show the same trend. We analyzed the fractal distributions, finding that the populations seem to be fractal at all dimensions, except for the Hapi distribution, which shows a possible fractal behavior for small dimensions only. Finally, the average values of the shape parameters reveal solid and roundish boulders in all populations we studied.

Item URL in elib:https://elib.dlr.de/131290/
Document Type:Article
Title:Quantitative analysis of isolated boulder fields on comet 67P/Churyumov-Gerasimenko
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Cambianica, P.Center of Studies and Activities for Space (CISAS) “G. Colombo”, University of Padova, Via Venezia 15, 35131 Padova, ItalyUNSPECIFIED
Cremonese, G.INAF Astronomical observatory of Padova, Vicolo dell’Osservatorio 5, 35122 Padova, ItalyUNSPECIFIED
Naletto, G.Center of Studies and Activities for Space (CISAS) “G. Colombo”, University of Padova, Via Venezia 15, 35131 Padova, ItalyUNSPECIFIED
Lucchetti, A.INAF Astronomical observatory of Padova, Vicolo dell’Osservatorio 5, 35122 Padova, ItalyUNSPECIFIED
Pajola, M.INAF Astronomical observatory of Padova, Vicolo dell’Osservatorio 5, 35122 Padova, ItalyUNSPECIFIED
Penasa, L.Center of Studies and Activities for Space (CISAS) “G. Colombo”, University of Padova, Via Venezia 15, 35131 Padova, ItalyUNSPECIFIED
Simioni, E.INAF Astronomical observatory of Padova, Vicolo dell’Osservatorio 5, 35122 Padova, ItalyUNSPECIFIED
Massironi, M.Center of Studies and Activities for Space (CISAS) “G. Colombo”, University of Padova, Via Venezia 15, 35131 Padova, ItalyUNSPECIFIED
Ferrari, S.Center of Studies and Activities for Space (CISAS) “G. Colombo”, University of Padova, Via Venezia 15, 35131 Padova, ItalyUNSPECIFIED
Bodewits, D.Physics Department, Auburn University, Auburn, AL 36849, USAUNSPECIFIED
La Forgia, F.Department of Physics and Astronomy “Galileo Galilei”, University of Padova, Vicolo dell’Osservatorio 3, 35122 Padova, ItalyUNSPECIFIED
Sierks, H.Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, 37077 Göttingen, GermanyUNSPECIFIED
Lamy, P. L.Laboratoire Atmosphères, Milieux et Observations Spatiales, CNRSUNSPECIFIED
Rodrigo, R.Centro de Astrobiologia (INTA-CSIC), 28691 Villanueva de la Canada, Madrid, SpainUNSPECIFIED
Koschny, D.Scientific Support Office, European Space Agency, 2201, Noordwijk, The NetherlandsUNSPECIFIED
Davidsson, B.Jet Propulsion Laboratory, M/S 183–401, 4800 Oak Grove Drive, Pasadena, CA 91109, USAUNSPECIFIED
Barucci, M. A.LESIA – Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195 Meudon, FranceUNSPECIFIED
Bertaux, J.-L.Laboratoire Atmosphères, Milieux et Observations Spatiales, CNRSUNSPECIFIED
Bertini, I.Department of Physics and Astronomy "G. Galilei", University of Padova, Vic. Osservatorio 3, 35122 Padova, ItalyUNSPECIFIED
Da Deppo, V.CNR-IFN UOS Padova LUXOR, via Trasea 7, 35131 Padova, ItalyUNSPECIFIED
Debei, S.Department of Industrial Engineering, University of Padova, Via Venezia 1, 35131 Padova, ItalyUNSPECIFIED
De Cecco, M.UNITN, Universitá di Trento, Via Mesiano, 77, 38100 Trento, ItalyUNSPECIFIED
Deller, J.Max-Planck Institut für Sonnensystemforschung, Goettingen, GermanyUNSPECIFIED
Fornasier, S.LESIA – Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195 Meudon, FranceUNSPECIFIED
Fulle, M.INAF – Osservatorio Astronomico di Trieste, via Tiepolo 11, 34143 Trieste, ItalyUNSPECIFIED
Gutiérrez, P. J.Instituto de Astrofisica de Andalucia CSIC, Glorieta de la Astronomia, 18008, Granada, SpainUNSPECIFIED
Güttler, C.Max-Planck-Institut für Sonnensystemforschung, 37077 Göttingen, GermanyUNSPECIFIED
Ip, W.-H.Graduate institute of Astronomy, National Central Univ., Chung-Li, TaiwanUNSPECIFIED
Keller, H. U.Institute for Geophysics and Extraterrestrial Physics, TU Braunschweig, 38106, Braunschweig, Germany; Deutches Zentrum für Luft- und Raumfahrt (DLR), Institüt für Planetenforschung, Rutherfordstraße 26, 12489 Berlin, GermanyUNSPECIFIED
Lara, L. M.Instituto de Astrofisica de Andalucía (CSIC), Glorieta de la As- tronomía s/n, 18008 Granada, SpainUNSPECIFIED
Lazzari, M.Department of Physics and Astronomy "G. Galilei", University of Padova, Vic. Osservatorio 3, 35122 Padova, ItalyUNSPECIFIED
Lin, Z.-Y.Graduate Institute of Astronomy, National Central University, 300 Chung-UNSPECIFIED
López-Moreno, J. J.Instituto de Astrofísica de Andalucía (CSIC), c/Glorieta de la Astronomía, 18008 Granada, SpainUNSPECIFIED
Marzari, F.Department of Physics and Astronomy “Galileo Galilei”, University of Padova, Via Marzolo 8, 35131 Padova, ItalyUNSPECIFIED
Mottola, S.stefano.mottola (at) dlr.dehttps://orcid.org/0000-0002-0457-3872
Shi, X.Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077 Göttingen, GermanyUNSPECIFIED
Scholten, F.Institute of Planetary Research, DLR, Rutherfordstrasse 2, 12489 Berlin, GermanyUNSPECIFIED
Toth, I.Konkoly Observatory, PO Box 67, 1525 Budapest, HungaryUNSPECIFIED
Tubiana, C.Max-Planck Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077 Göttingen, GermanyUNSPECIFIED
Vincent, J.-B.jean-baptiste.vincent (at) dlr.dehttps://orcid.org/0000-0001-6575-3079
Date:2019
Journal or Publication Title:Astronomy & Astrophysics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:630
DOI :10.1051/0004-6361/201834775
Page Range:A15
Publisher:EDP Sciences
ISSN:0004-6361
Status:Published
Keywords:comets: general – comets: individual: 67P/Churyumov-Gerasimenko – methods: data analysis
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt ROSETTA Instrumente, R - Projekt ROSETTA Lander
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Institute of Planetary Research > Planetary Geodesy
Deposited By: Mottola, Dr.phys. Stefano
Deposited On:28 Nov 2019 09:25
Last Modified:28 Nov 2019 09:25

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