Temporal morphological changes in the Imhotep region of comet 67P/Churyumov-Gerasimenko
Olivier Groussin
(1)
,
Holger Sierks
(2)
,
Cesare Barbieri
(3)
,
Philippe Lamy
(1)
,
Rafael Rodrigo
(4, 5)
,
Detlef Koschny
(6)
,
Hans Rickman
(7, 8)
,
Horst Uwe Keller
(9, 10)
,
Michael F. A'Hearn
(11)
,
Anne-Thérèse Auger
(1)
,
Maria A. Barucci
(12)
,
Jean-Loup Bertaux
(13)
,
Ivano Bertini
(14)
,
Sébastien Besse
(6)
,
Gabriele Cremonese
(15)
,
Vania da Deppo
(16)
,
Björn Davidsson
(7)
,
Stefano Debei
(15)
,
Mariolino de Cecco
(17)
,
Mohamed Ramy El-Maarry
(18)
,
Sonia Fornasier
(12)
,
Marco Fulle
(19)
,
Pedro J. Gutiérrez
(20)
,
Carsten Güttler
(2)
,
Stubbe Hviid
(3)
,
Wing-Huen Ip
(21)
,
Laurent Jorda
(1)
,
Jörg Knollenberg
(3)
,
Gabor Kovacs
(2)
,
J.-Rainer Kramm
(2)
,
Ekkehard Kührt
(3)
,
Michael Kueppers
(22)
,
Luisa-Maria Lara
(20)
,
Monica Lazzarin
(3)
,
Josè Juan Lopez-Moreno
(20)
,
Stephen Lowry
(23)
,
Simone Marchi
(24)
,
Francesco Marzari
(3)
,
Matteo Massironi
(25, 14)
,
Stefano Mottola
(3)
,
Giampiero Naletto
(14, 16, 26)
,
Nilda Oklay
(2)
,
Maurizio Pajola
(14)
,
Antoine Pommerol
(18)
,
Nicholas Thomas
(18)
,
I. Toth
(27)
,
Cécilia Tubiana
(2)
,
Jean-Baptiste Vincent
(2)
1
LAM -
Laboratoire d'Astrophysique de Marseille
2 MPS - Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research
3 Dipartimento di Fisica e Astronomia "Galileo Galilei"
4 CAB - Centro de Astrobiologia [Madrid]
5 ISSI - International Space Science Institute [Bern]
6 RSSD - Research and Scientific Support Department, ESTEC
7 Department of Physics and Astronomy [Uppsala]
8 CBK - Space Research Centre of Polish Academy of Sciences
9 IGEP - Institut für Geophysik und Extraterrestrische Physik [Braunschweig]
10 DLR Institut für Planetenforschung
11 Department of Astronomy [College Park]
12 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
13 PLANETO - LATMOS
14 CISAS - Centro di Ateneo di Studi e Attività Spaziali “Giuseppe Colombo”
15 Department of Industrial Engineering [Padova]
16 IFN - CNR Institute for Photonics and Nanotechnologies
17 UNITN - Università degli Studi di Trento = University of Trento
18 Physikalisches Institut [Bern]
19 OAT - INAF - Osservatorio Astronomico di Trieste
20 IAA - Instituto de Astrofísica de Andalucía
21 Institute of Space Science [Taiwan]
22 Operations Department (ESAC)
23 CAPS - Centre for Astrophysics and Planetary Science [Canterbury]
24 SSERVI - Solar System Exploration Research Virtual Institute
25 OAPD - INAF - Osservatorio Astronomico di Padova
26 DEI - Department of Information Engineering [Padova]
27 Konkoly Observatory
2 MPS - Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research
3 Dipartimento di Fisica e Astronomia "Galileo Galilei"
4 CAB - Centro de Astrobiologia [Madrid]
5 ISSI - International Space Science Institute [Bern]
6 RSSD - Research and Scientific Support Department, ESTEC
7 Department of Physics and Astronomy [Uppsala]
8 CBK - Space Research Centre of Polish Academy of Sciences
9 IGEP - Institut für Geophysik und Extraterrestrische Physik [Braunschweig]
10 DLR Institut für Planetenforschung
11 Department of Astronomy [College Park]
12 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
13 PLANETO - LATMOS
14 CISAS - Centro di Ateneo di Studi e Attività Spaziali “Giuseppe Colombo”
15 Department of Industrial Engineering [Padova]
16 IFN - CNR Institute for Photonics and Nanotechnologies
17 UNITN - Università degli Studi di Trento = University of Trento
18 Physikalisches Institut [Bern]
19 OAT - INAF - Osservatorio Astronomico di Trieste
20 IAA - Instituto de Astrofísica de Andalucía
21 Institute of Space Science [Taiwan]
22 Operations Department (ESAC)
23 CAPS - Centre for Astrophysics and Planetary Science [Canterbury]
24 SSERVI - Solar System Exploration Research Virtual Institute
25 OAPD - INAF - Osservatorio Astronomico di Padova
26 DEI - Department of Information Engineering [Padova]
27 Konkoly Observatory
Cesare Barbieri
- Fonction : Auteur
- PersonId : 757032
- ORCID : 0000-0002-6257-9076
Vania da Deppo
- Fonction : Auteur
- PersonId : 763247
- ORCID : 0000-0001-6273-8738
Wing-Huen Ip
- Fonction : Auteur
- PersonId : 770404
- ORCID : 0000-0001-5368-386X
Laurent Jorda
- Fonction : Auteur
- PersonId : 746464
- IdHAL : laurent-jorda
- ORCID : 0000-0001-8735-3308
- IdRef : 180975161
Maurizio Pajola
- Fonction : Auteur
- PersonId : 767226
- ORCID : 0000-0002-3144-1277
Résumé
We report on the first major temporal morphological changes observed on the surface of the nucleus of comet 67P/Churyumov-Gerasimenko in the smooth terrains of the Imhotep region. We used images of the OSIRIS cameras onboard Rosetta to follow the temporal changes from 24 May 2015 to 11 July 2015. The morphological changes observed on the surface are visible in the form of roundish features that are growing in size from a given location in a preferential direction at a rate of 5.6-8.1 x 10-5 m s-1 during the observational period. The location where the changes started and the contours of the expanding features are bluer than the surroundings, which suggests that ices (H2O and/or CO2<:sub> are exposed on the surface. However, sublimation of ices alone is not sufficient to explain the observed expanding features. No significant variations in the dust activity pattern are observed during the period of changes.
Domaines
Astrophysique [astro-ph]Origine | Fichiers éditeurs autorisés sur une archive ouverte |
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