Data di Pubblicazione:
2019
Abstract:
Aims. We investigate the surface distribution of the source regions of dust jets on comet 67P/Churyumov-Gerasimenko as a function
of time.
Methods. The dust jet source regions were traced by the comprehensive imaging data set provided by the OSIRIS scientific camera.
Results. We show in detail how the projected footpoints of the dust jets and hence the outgassing zone would move in consonance with
the sunlit belt. Furthermore, a number of source regions characterized by repeated jet activity might be the result of local topographical
variations or compositional heterogeneities.
Conclusions. The spatial and temporal variations in source regions of the dust jets are influenced significantly by the seasonal effect.
The strong dependence on the solar zenith angle and local time could be related to the gas sublimation process driven by solar insolation
on a surface layer of low thermal inertia.
of time.
Methods. The dust jet source regions were traced by the comprehensive imaging data set provided by the OSIRIS scientific camera.
Results. We show in detail how the projected footpoints of the dust jets and hence the outgassing zone would move in consonance with
the sunlit belt. Furthermore, a number of source regions characterized by repeated jet activity might be the result of local topographical
variations or compositional heterogeneities.
Conclusions. The spatial and temporal variations in source regions of the dust jets are influenced significantly by the seasonal effect.
The strong dependence on the solar zenith angle and local time could be related to the gas sublimation process driven by solar insolation
on a surface layer of low thermal inertia.
Tipologia CRIS:
01.01 - Articolo in rivista
Elenco autori:
Lai, I. -L.; Ip, W. -H.; Lee, J. -C.; Lin, Z. -Y.; Vincent, J. -B.; Oklay, N.; Sierks, H.; Barbieri, C.; Lamy, P.; Rodrigo, R.; Koschny, D.; Rickman, H.; Keller, H. U.; Agarwal, J.; Barucci, M. A.; Bertaux, J. -L.; Bertini, I.; Bodewits, D.; Boudreault, S.; Cremonese, G.; Da Deppo, V.; Davidsson, B.; Debei, S.; De Cecco, M.; Deller, J.; Fornasier, S.; Fulle, M.; Groussin, O.; Gutiérrez, P. J.; Güttler, C.; Hofmann, M.; Hviid, S. F.; Jorda, L.; Knollenberg, J.; Kovacs, G.; Kramm, J. -R.; Kührt, E.; Küppers, M.; Lara, L. M.; Lazzarin, M.; López-Moreno, J. J.; Marzari, F.; Naletto, G.; Shi, X.; Tubiana, C.; Thomas, N.
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