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The backscattering ratio of comet 67P/Churyumov-Gerasimenko dust coma as seen by OSIRIS onboard Rosetta
Bertini, I. and La Forgia, F and Fulle, M. and Tubiana, C. and Güttler, C. and Moreno, F. and Agarwal, J. and Munoz, O. and Mottola, S. and Ivanovski, S. and Pajola, M. and Lucchetti, A. and Petropoulou, V. and Lazzari, M. and Rotundi, A. and Bodewits, D. and Frattin, E. and Toth, I. and Masoumzadeh, N and Kovacs, G. and Rinaldi, G. and Guirado, D. and Sierks, H. and Naletto, G. and Lamy, P. and Rodrigo, R. and Koschny, D. and Davidsson, B. and Barbieri, C. and Barucci, M.A. and Bertaux, J-L. and Cambianica, P. and Cremonese, G. and Da Deppo, V. and Debei, S. and De Cecco, M. and Deller, J. and Ferrari, S. and Ferri, F. and Fornasier, S. and Gutiérrez, P.J. and Hasselmann, P.H. and Ip, W-H. and Keller, H.U. and Lara, L.M. and Moreno, J.J. Lopez and Marzari, F. and Massironi, M. and Penasa, L. and Shi, X.
(2019)
The backscattering ratio of comet 67P/Churyumov-Gerasimenko dust coma as seen by OSIRIS onboard Rosetta.
Monthly Notices of the Royal Astronomical Society, 482, pp. 2924-2933.
Oxford University Press.
doi: 10.1093/mnras/sty2843.
ISSN 0035-8711.
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AbstractRemote sensing observations of dust particles ejected from comets provide important hints on the intimate nature of the materials composing these primitive objects. The measurement of dust coma backscattering ratio, BSR, defined as the ratio of the reflectance at phase angle 0◦ and 30◦, helps tuning theoretical models aimed at solving the inverse scattering problem deriving information on the nature of the ejected particles. The Rosetta/OSIRIS camera sampled the coma phase function of comet 67P, with four series acquired at low phase angles from 2015 January to 2016 May. We also added previously published data to our analysis to increase the temporal resolution of our findings.We measured a BSR in the range ∼ [1.7–3.6], broader than the range found in literature from ground-based observations of other comets. We found that during the post-perihelion phase, the BSR is systematically larger than the classical cometary dust values only for nucleocentric distances smaller than ∼100 km. We explain this trend in terms of a cloud of chunks orbiting the nucleus at distances <100 km ejected during perihelion and slowly collapsing on the nucleus over a few months because of the coma gas drag. This also implies that the threshold particle size for the dust phase function to become similar to the nucleus phase function is between 2.5 mm and 0.1 m, taking into account previous Rosetta findings. Item URL in elib: | https://elib.dlr.de/131577/ |
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Document Type: | Article |
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Title: | The backscattering ratio of comet 67P/Churyumov-Gerasimenko dust coma as seen by OSIRIS onboard Rosetta |
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Authors: | Authors | Institution or Email of Authors | Author's ORCID iD | ORCID Put Code |
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Bertini, I. | dipartimento di astronomia, università di padova, padova, italy | UNSPECIFIED | UNSPECIFIED | La Forgia, F | Department of Physics and Astronomy “G. Galilei”, University of Padova, Vic. Osservatorio 3, 35122 Padova, Italy | UNSPECIFIED | UNSPECIFIED | Fulle, M. | INAF - Osservatorio Astronomico di Trieste, Trieste, Italy | UNSPECIFIED | UNSPECIFIED | Tubiana, C. | Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany | UNSPECIFIED | UNSPECIFIED | Güttler, C. | Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany | UNSPECIFIED | UNSPECIFIED | Moreno, F. | Instituto de Astrofísica de Andalucía – CSIC, 18080 Granada, Spain | UNSPECIFIED | UNSPECIFIED | Agarwal, J. | Max-Planck-Institut für Sonnensystemforschung, Justus-von- Liebig-Weg, 3 37077 Göttingen, Germany | UNSPECIFIED | UNSPECIFIED | Munoz, O. | Instituto de Astrofisica de Andalucia, CSIC, c/ Glorieta de la Astronomia s/n, 1800, Granada, Spain | UNSPECIFIED | UNSPECIFIED | Mottola, S. | UNSPECIFIED | https://orcid.org/0000-0002-0457-3872 | UNSPECIFIED | Ivanovski, S. | Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica (INAF), Via Fosso del Cavaliere, 100, 0133 Rome, Italy | UNSPECIFIED | UNSPECIFIED | Pajola, M. | INAF Osservatorio Astronomico di Padova, Padova , Italy | UNSPECIFIED | UNSPECIFIED | Lucchetti, A. | Center of Studies and Activities for Space (CISAS) ‘G. Colombo’, Univer- | UNSPECIFIED | UNSPECIFIED | Petropoulou, V. | Center of Studies and Activities for Space, CISAS, ‘G. Colombo’, University | UNSPECIFIED | UNSPECIFIED | Lazzari, M. | Department of Physics and Astronomy "G. Galilei", University of Padova, Vic. Osservatorio 3, 35122 Padova, Italy | UNSPECIFIED | UNSPECIFIED | Rotundi, A. | INAF - Istituto di Astrofisica e Planetologia Spaziali, Area Ricerca Tor Vergata, Via Fosso del Cavaliere 100, 00133 Rome, Italy | UNSPECIFIED | UNSPECIFIED | Bodewits, D. | Physics Department, Auburn University, Auburn, AL 36849, USA | UNSPECIFIED | UNSPECIFIED | Frattin, E. | INAF, Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, | UNSPECIFIED | UNSPECIFIED | Toth, I. | Konkoly Observatory, MTA CSFK CSI, 1525 Budapest, Hungary | UNSPECIFIED | UNSPECIFIED | Masoumzadeh, N | Max-Planck-Institut für Sonnensystemforschung, Justus-von- Liebig-Weg, 3 37077 Göttingen, Germany | UNSPECIFIED | UNSPECIFIED | Kovacs, G. | Max-Planck Institut fuer Sonnensystemforschung, Justus-von- Liebig-Weg, 3 37077 Goettingen, Germany | UNSPECIFIED | UNSPECIFIED | Rinaldi, G. | INAF – Istituto di Fisica dello Spazio Interplanetario, via del Fosso del Cavaliere 100, 00133 Roma, Italy | UNSPECIFIED | UNSPECIFIED | Guirado, D. | Instituto de Astrofisica de Andalucia, CSIC, c/ Glorieta de la Astronomia s/n, 1800, Granada, Spain | UNSPECIFIED | UNSPECIFIED | Sierks, H. | Max-Planck Institut fuer Sonnensystemforschung, Justus-von- Liebig-Weg, 3 37077 Goettingen, Germany | UNSPECIFIED | UNSPECIFIED | Naletto, G. | Centro di Ateneo di Studi ed Attività Spaziali, "Giuseppe Colombo" (CISAS), University of Padova, via Venezia 15, 35131 Padova, Italy | UNSPECIFIED | UNSPECIFIED | Lamy, P. | Aix Marseille Université, CNRS, LAM (Laboratoire d’Astro- physique de Marseille) UMR 7326, 13388, Marseille, France | UNSPECIFIED | UNSPECIFIED | Rodrigo, R. | Centro de Astrobiologia (INTA-CSIC), 28850 Torrejan de Ardoz, Madrid, Spain | UNSPECIFIED | UNSPECIFIED | Koschny, D. | Research and Scientific Support Department, Directorate of Science and Robotic Exploration, ESA ESTEC, The Netherlands | UNSPECIFIED | UNSPECIFIED | Davidsson, B. | Jet Propulsion Laboratory, M/S 183–401, 4800 Oak Grove Drive, Pasadena, CA 91109, USA | UNSPECIFIED | UNSPECIFIED | Barbieri, C. | University of Padova, Department of Physics and Astronomy, vicolo dell’Osservatorio 3, 35122, Padova, Italy | UNSPECIFIED | UNSPECIFIED | Barucci, M.A. | LESIA - Observatoire de Paris, CNRS, UPMC, Université Paris-Diderot, 92195 Meudon, France | UNSPECIFIED | UNSPECIFIED | Bertaux, J-L. | laboratoire atmosphères, milieux, observations spatiales, cnrs/uvsq/upmc, 11 boulevard d’alembert, 78280 guyancourt, france | UNSPECIFIED | UNSPECIFIED | Cambianica, P. | Center of Studies and Activities for Space (CISAS) “G. Colombo”, University of Padova, Via Venezia 15, 35131 Padova, Italy | UNSPECIFIED | UNSPECIFIED | Cremonese, G. | UNSPECIFIED | UNSPECIFIED | UNSPECIFIED | Da Deppo, V. | CNR-IFN UOS Padova LUXOR, via Trasea 7, 35131, Padova, Italy | UNSPECIFIED | UNSPECIFIED | Debei, S. | Università di Padova, Center of Studies and Activities of Space (CISAS) "G.Colombo", Padova, Italy | UNSPECIFIED | UNSPECIFIED | De Cecco, M. | UNITN, University of Trento, via Mesiano 77, 38100, Trento, Italy | UNSPECIFIED | UNSPECIFIED | Deller, J. | Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, | UNSPECIFIED | UNSPECIFIED | Ferrari, S. | Center of Studies and Activities for Space (CISAS) “G. Colombo”, University of Padova, Via Venezia 15, 35131 Padova, Italy | UNSPECIFIED | UNSPECIFIED | Ferri, F. | Center of Studies and Activities for Space (CISAS) ‘G. Colombo’, Univer- | UNSPECIFIED | UNSPECIFIED | Fornasier, S. | LESIA, Obs. de Paris, CNRS, Univ Paris 06, Univ. Paris-Diderot, 5 place J. Janssen, 92195 Meudon, France | UNSPECIFIED | UNSPECIFIED | Gutiérrez, P.J. | Instituto de Astrofisica de Andalucia-CSIC, Glorieta de la Astrono- mia, 18008 Granada, Spain | UNSPECIFIED | UNSPECIFIED | Hasselmann, P.H. | LESIA - Observatoire de Paris, CNRS, UPMC, Université Paris-Diderot, 92195 Meudon, France | UNSPECIFIED | UNSPECIFIED | Ip, W-H. | Institute for Space Science, National Central University, Chung Li, Taiwan | UNSPECIFIED | UNSPECIFIED | Keller, H.U. | UNSPECIFIED | UNSPECIFIED | UNSPECIFIED | Lara, L.M. | UNSPECIFIED | UNSPECIFIED | UNSPECIFIED | Moreno, J.J. Lopez | instituto de astrofisica de andalucia csic, glorieta de la astronomia, 18008, granada, spain | UNSPECIFIED | UNSPECIFIED | Marzari, F. | Department of Physics and Astronomy “G. Galilei”, University of Padova, Italy | UNSPECIFIED | UNSPECIFIED | Massironi, M. | Dipartimento di Geoscienze, University of Padova, via G. Gradenigo 6, 35131 Padova, Italy | UNSPECIFIED | UNSPECIFIED | Penasa, L. | Center of Studies and Activities for Space (CISAS) ‘G. Colombo’, Univer- | UNSPECIFIED | UNSPECIFIED | Shi, X. | Max-Planck-Institut für Sonnensystemforschung, Justus-von- Liebig-Weg, 3 37077 Göttingen, Germany | UNSPECIFIED | UNSPECIFIED |
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Date: | 2019 |
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Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society |
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Refereed publication: | Yes |
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Open Access: | Yes |
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Gold Open Access: | No |
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In SCOPUS: | Yes |
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In ISI Web of Science: | Yes |
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Volume: | 482 |
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DOI: | 10.1093/mnras/sty2843 |
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Page Range: | pp. 2924-2933 |
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Publisher: | Oxford University Press |
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ISSN: | 0035-8711 |
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Status: | Published |
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Keywords: | scattering –methods: data analysis – techniques: image processing – techniques:
photometric – comets: individual: 67P/Churyumov-Gerasimenko |
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HGF - Research field: | Aeronautics, Space and Transport |
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HGF - Program: | Space |
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HGF - Program Themes: | Space Exploration |
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DLR - Research area: | Raumfahrt |
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DLR - Program: | R EW - Space Exploration |
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DLR - Research theme (Project): | R - Project ROSETTA Instruments (old) |
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Location: |
Berlin-Adlershof
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Institutes and Institutions: | Institute of Planetary Research > Asteroids and Comets |
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Deposited By: |
Mottola, Dr.phys. Stefano
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Deposited On: | 02 Dec 2019 15:24 |
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Last Modified: | 24 Mar 2020 13:09 |
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