Seasonal variations in source regions of the dust jets on comet 67P/Churyumov-Gerasimenko

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.; ... (2019). Seasonal variations in source regions of the dust jets on comet 67P/Churyumov-Gerasimenko. Astronomy and astrophysics, 630, A17. EDP Sciences 10.1051/0004-6361/201732094

[img] Text
aa32094-17.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (11MB) | Request a copy

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 out gassing 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 zenit hangle and local time could be related to the gas sublimation process driven by solar insolation on a surface layer of low thermal inertia.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences
08 Faculty of Science > Physics Institute
08 Faculty of Science > Physics Institute > NCCR PlanetS

UniBE Contributor:

Rodrigo, Rafael and Thomas, Nicolas

Subjects:

500 Science > 520 Astronomy
600 Technology > 620 Engineering

ISSN:

0004-6361

Publisher:

EDP Sciences

Language:

English

Submitter:

Dora Ursula Zimmerer

Date Deposited:

04 Feb 2020 15:08

Last Modified:

04 Feb 2020 15:08

Publisher DOI:

10.1051/0004-6361/201732094

BORIS DOI:

10.7892/boris.139347

URI:

https://boris.unibe.ch/id/eprint/139347

Actions (login required)

Edit item Edit item
Provide Feedback