Temporal morphological changes in the Imhotep region of comet 67P/Churyumov-Gerasimenko - Université Paris Cité Accéder directement au contenu
Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2015

Temporal morphological changes in the Imhotep region of comet 67P/Churyumov-Gerasimenko

Olivier Groussin
  • Fonction : Auteur
  • PersonId : 837612
Philippe Lamy
  • Fonction : Auteur
  • PersonId : 994769
Jean-Loup Bertaux
  • Fonction : Auteur
  • PersonId : 914210
Pedro J. Gutiérrez
  • Fonction : Auteur
  • PersonId : 880386
Wing-Huen Ip
Laurent Jorda
I. Toth
  • Fonction : Auteur

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.
Fichier principal
Vignette du fichier
aa27020-15.pdf (7.05 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-01439792 , version 1 (05-12-2020)

Identifiants

Citer

Olivier Groussin, Holger Sierks, Cesare Barbieri, Philippe Lamy, Rafael Rodrigo, et al.. Temporal morphological changes in the Imhotep region of comet 67P/Churyumov-Gerasimenko. Astronomy and Astrophysics - A&A, 2015, 583, A36 (4 p.). ⟨10.1051/0004-6361/201527020⟩. ⟨hal-01439792⟩
484 Consultations
20 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More