Synthesis of the morphological description of cometary dust at comet 67P/Churyumov-Gerasimenko

Carsten Güttler (1) , Thurid Mannel (2, 3) , Alessandra Rotundi (4, 5) , Sihane Merouane (1) , Marco Fulle (6) , D. Bockelée-Morvan (7) , Jérémie Lasue (8) , Anny Chantal Levasseur-Regourd (9) , J. Blum (10) , Giampiero Naletto (11, 12, 13) , Holger Sierks (1) , Martin Hilchenbach (1) , Cécilia Tubiana (1) , Fabrizio Capaccioni (4) , John Paquette (1) , Alberto Flandes (14) , F. Moreno (15) , Jessica Agarwal (1) , Dennis Bodewits (16) , Ivano Bertini (12) , G. P. Tozzi (17) , K. Hornung (18) , Yves Langevin (19) , Harald Krüger (1) , A. Longobardo (4) , Vincenzo Della corte (4) , Imre Toth (20) , Gianrico Filacchione (4) , Stavro L. Ivanovski (6) , Stefano Mottola (21) , Giovanna Rinaldi (4)

1 MPS - Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research
2 IWF - Space Research Institute of Austrian Academy of Sciences
3 Institute of Physics [Graz]
4 IAPS - Istituto di Astrofisica e Planetologia Spaziali - INAF
5 DIST - Dipartimento di Scienze e Tecnologie [Napoli]
6 OAT - INAF - Osservatorio Astronomico di Trieste
7 LESIA (UMR_8109) - Laboratoire d'études spatiales et d'instrumentation en astrophysique
8 IRAP - Institut de recherche en astrophysique et planétologie
9 PLANETO - LATMOS
10 IGEP - Institut für Geophysik und Extraterrestrische Physik [Braunschweig]
11 CISAS - Centro di Ateneo di Studi e Attività Spaziali “Giuseppe Colombo”
12 Dipartimento di Fisica e Astronomia "Galileo Galilei"
13 IFN - CNR Istituto di Fotonica e Nanotecnologie [Milano]
14 Instituto de Geofisica [Mexico]
15 IAA - Instituto de Astrofísica de Andalucía
16 Department of Physics [Auburn]
17 OAA - INAF - Osservatorio Astrofisico di Arcetri
18 Universität der Bundeswehr München [Neubiberg]
19 IAS - Institut d'astrophysique spatiale
20 Konkoly Observatory
21 DLR Institut für Planetenforschung

Before Rosetta, the space missions Giotto and Stardust shaped our view on cometary dust, supported by plentiful data from Earth based observations and interplanetary dust particles collected in the Earth’s atmosphere. The Rosetta mission at comet 67P/Churyumov-Gerasimenko was equipped with a multitude of instruments designed to study cometary dust. While an abundant amount of data was presented in several individual papers, many focused on a dedicated measurement or topic. Different instruments, methods, and data sources provide different measurement parameters and potentially introduce different biases. This can be an advantage if the complementary aspect of such a complex data set can be exploited. However, it also poses a challenge in the comparison of results in the first place. The aim of this work therefore is to summarize dust results from Rosetta and before. We establish a simple classification as a common framework for intercomparison. This classification is based on the dust particle structure, porosity, and strength and also on its size. Depending on the instrumentation, these are not direct measurement parameters, but we chose them because they were the most reliable for deriving our model. The proposed classification has proved helpful in the Rosetta dust community, and we offer it here also for a broader context. In this manner, we hope to better identify synergies between different instruments and methods in the future.

Domaines: Physique [physics]; Astrophysique [astro-ph]

Carsten Güttler, Thurid Mannel, Alessandra Rotundi, Sihane Merouane, Marco Fulle, et al.. Synthesis of the morphological description of cometary dust at comet 67P/Churyumov-Gerasimenko. Astronomy and Astrophysics - A&A, 2019, 630, A24 (15 p.). ⟨10.1051/0004-6361/201834751⟩. ⟨insu-02055141⟩