Rotating dust particles in the coma of comet 67P/Churyumov-Gerasimenko

M. Fulle 1 S. L. Ivanovski 2 I. Bertini 3 P. Gutierrez 4 L. Lara 4 H. Sierks 5 V. Zakharov 6 V. Della Corte 2 A. Rotundi 7, 2 C. Barbieri 8 P. L. Lamy 9 R. Rodrigo 10, 11 D. Koschny 12 H. Rickman 13, 14 H. U. Keller 15 J. Agarwal 5 M.F. A'Hearn 16 M.A. Barucci 6 Jean-Loup Bertaux 17 D. Bodewits 16 G. Cremonese 18 V. Da Deppo 19 B. Davidsson 14 S. Debei 20 M. De Cecco 21 S. Fornasier 22, 6 O. Groussin 9 C. Güttler 5 S. F. Hviid 23 W. Ip 24 L. Jorda 9 J. Knollenberg 23 R. Kramm 5 E. Kührt 23 M. Küppers 25 M. Lazzarin 8 J. J. Lopez-Moreno 4 F. Marzari 8 H. Michalik 26 G. Naletto 3, 20, 19 N. Oklay 5 L. Sabau 27 Nicolas Thomas 28 C. Tubiana 5 J.-B. Vincent 5 K.-P. Wenzel 12
1 OAT - INAF - Osservatorio Astronomico di Trieste
2 IAPS - Istituto di Astrofisica e Planetologia Spaziali
3 CISAS - Centro di Ateneo di Studi e Attività Spaziali “Giuseppe Colombo”
4 IAA - Instituto de Astrofísica de Andalucía
5 MPS - Max-Planck-Institut für Sonnensystemforschung
6 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
7 Universita degli studi di Napoli "Parthenope" [Napoli]
8 Dipartimento di Fisica e Astronomia "Galileo Galilei"
9 LAM - Laboratoire d'Astrophysique de Marseille
10 CAB - Centro de Astrobiologia [Madrid]
11 ISSI - International Space Science Institute
12 RSSD - Research and Scientific Support Department, ESTEC
13 CBK - Space Research Centre [Warsaw]
14 Department of Physics and Astronomy [Uppsala]
15 IGEP - Institut für Geophysik und Extraterrestrische Physik [Braunschweig]
16 Department of Astronomy [College Park]
17 IMPEC - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
18 OAPD - INAF - Osservatorio Astronomico di Padova
19 IFN - CNR Institute for Photonics and Nanotechnologies
20 Department of Industrial Engineering [Padova]
21 University of Trento [Trento]
22 UPD7 - Université Paris Diderot - Paris 7
23 DLR Institut für Planetenforschung
24 IANCU - Institute of Astronomy [Taiwan]
25 Operations Department (ESAC)
26 Institut für Datentechnik und Kommunikationsnetze
27 INTA - Instituto Nacional de Técnica Aeroespacial
28 Physikalisches Institut [Bern]
Abstract : During September and October 2014, the OSIRIS cameras onboard the ESA Rosetta mission detected millions of single particles. Many of these dust particles appear as long tracks (due to both the dust proper motion and the spacecraft motion during the exposure time) with a clear brightness periodicity. Aims. We interpret the observed periodic features as a rotational and translational motion of aspherical dust grains. Methods. By counting the peaks of each track, we obtained statistics of a rotation frequency. We compared these results with the rotational frequency predicted by a model of aspherical dust grain dynamics in a model gas flow. By testing many possible sets of physical conditions and grain characteristics, we constrained the rotational properties of dust grains. Results. We analyzed on the motion of rotating aspherical dust grains with different cross sections in flow conditions corresponding to the coma of 67P/Churyumov-Gerasimenko qualitatively and quantitatively. Based on the OSIRIS observations, we constrain the possible physical parameters of the grains.
Keywords : 67P/Churyumov-Gerasimenko Comets Numerical methods Space vehicles
Type de document :
Article dans une revue
Astronomy and Astrophysics - A&A, EDP Sciences, 2015, 583, A14 (8 p.). 〈10.1051/0004-6361/201526158〉
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https://hal-insu.archives-ouvertes.fr/insu-01202381
Contributeur : Catherine Cardon <>
Soumis le : dimanche 20 septembre 2015 - 17:14:58
Dernière modification le : jeudi 14 juin 2018 - 10:54:03

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INSU | OBSPM | LESIA | UPMC | OSU-INSTITUT-PYTHEAS | UVSQ | LAM | LATMOS | UNIV-AMU | PSL | USPC | UNIV-PARIS-SACLAY

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M. Fulle, S. L. Ivanovski, I. Bertini, P. Gutierrez, L. Lara, et al.. Rotating dust particles in the coma of comet 67P/Churyumov-Gerasimenko. Astronomy and Astrophysics - A&A, EDP Sciences, 2015, 583, A14 (8 p.). 〈10.1051/0004-6361/201526158〉. 〈insu-01202381〉

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