Comparative study of water ice exposures on cometary nuclei using multispectral imaging data

Nilda Oklay 1 Jessica M. Sunshine 2 Maurizio Pajola 3, 4 Antoine Pommerol 5 Jean-Baptiste Vincent 1 Stefano Mottola 6 Holger Sierks 1 Sonia Fornasier 7 M. Antonella Barucci 7 Frank Preusker 6 Frank Scholten 6 Luisa M. Lara 8 Cesare Barbieri 9 Philippe L. Lamy 10 Rafael Rodrigo 11, 12 Detlef Koschny 13 Hans Rickman 14, 15 Michael F. A’hearn 2 Jean-Loup Bertaux 16 Ivano Bertini 4 Dennis Bodewits 2 Gabriele Cremonese 17 Vania Da Deppo 18 Björn J. R. Davidsson 19 Stefano Debei 20 Mariolino De Cecco 21 Jakob Deller 1 Marco Fulle 21 Adeline Gicquel 1 Olivier Groussin 10 Pedro J. Gutiérrez 8 Carsten Güttler 1 I. Hall 1 M. Hofmann 1 Stubbe F. Hviid 6 W.-H. Ip 22 L. Jorda 10 H. U. Keller 23 J. Knollenberg 6 G. Kovacs 1 J.-R. Kramm 1 E. Kührt 6 M. Küppers 24 M. Lazzarin 9 Z.-Y. Lin 25 J. J. Lopez Moreno 8 F. Marzari 9 G. Naletto 18, 26, 4 X. Shi 1 Nicholas Thomas 5 C. Tubiana 1
1 MPS - Max-Planck-Institut für Sonnensystemforschung
2 Department of Astronomy [College Park]
3 ARC - NASA Ames Research Center
4 CISAS - Centro di Ateneo di Studi e Attività Spaziali “Giuseppe Colombo”
5 Physikalisches Institut [Bern]
6 DLR Institut für Planetenforschung
7 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
8 IAA - Instituto de Astrofísica de Andalucía
9 Dipartimento di Fisica e Astronomia "Galileo Galilei"
10 LAM - Laboratoire d'Astrophysique de Marseille
11 CAB - Centro de Astrobiologia [Madrid]
12 ISSI - International Space Science Institute
13 ESTEC - European Space Research and Technology Centre
14 Department of Physics and Astronomy [Uppsala]
15 CBK - Space Research Centre [Warsaw]
16 IMPEC - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
17 OAPD - INAF - Osservatorio Astronomico di Padova
18 IFN - CNR Institute for Photonics and Nanotechnologies
19 JPL - Jet Propulsion Laboratory
20 Department of Industrial Engineering [Padova]
21 OAT - INAF - Osservatorio Astronomico di Trieste
22 Institute of Space Science [Taiwan]
23 IGEP - Institut für Geophysik und Extraterrestrische Physik [Braunschweig]
24 Operations Department (ESAC)
25 IANCU - Institute of Astronomy [Taiwan]
26 DEI - Department of Information Engineering [Padova]
Abstract : Deep Impact, EPOXI and Rosetta missions visited comets 9P/Tempel 1, 103P/Hartley 2 and 67P/Churyumov-Gerasimenko respectively. Each of these three missions was equipped with both multispectral imagers and infrared spectrometers. Bright blue features containing water ice were detected in each of these comet nuclei. We analysed multispectral properties of enriched water ice features observed via OSIRIS NAC on comet 67P in the wavelength range of 260 nm to 1000 nm and then compared with multispectral data of water ice deposits observed on comets 9P and 103P. We characterize the UV/VIS properties of water ice rich features observed on the nuclei of these three comets. When compared to the average surface of each comet, our analysis shows that the water ice deposits seen on comet 9P are similar to the clustered water ice rich features seen on comet 67P, while the water ice deposit seen on comet 103P is more akin to two large isolated water ice rich features seen on comet 67P. Our results indicate that the water ice deposit observed on comet 103P contains more water ice than the water ice rich features observed on comets 9P and 67P, proportionally to the average surface of each nucleus.
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Article dans une revue
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P - Oxford Open Option A, 2016, 462 (Suppl. 1), pp.S394-S414. 〈10.1093/mnras/stw2918〉
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Nilda Oklay, Jessica M. Sunshine, Maurizio Pajola, Antoine Pommerol, Jean-Baptiste Vincent, et al.. Comparative study of water ice exposures on cometary nuclei using multispectral imaging data. Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P - Oxford Open Option A, 2016, 462 (Suppl. 1), pp.S394-S414. 〈10.1093/mnras/stw2918〉. 〈insu-01397742〉

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