Observations and analysis of a curved jet in the coma of comet 67P/Churyumov-Gerasimenko

Lin, Z.-Y.; Lai, I.-L.; Su, C.-C.; Ip, W.-H.; Lee, J.-C.; Wu, J.-S.; Vincent, J.-B.; La Forgia, F.; Sierks, H.; Barbieri, C.; Lamy, P. L.; Rodrigo, R.; Koschny, D.; Rickman, H.; Keller, H. U.; Agarwal, J.; A’Hearn, M. F.; Barucci, M. A.; Bertaux, J.–L.; Bertini, I.; ... (2016). Observations and analysis of a curved jet in the coma of comet 67P/Churyumov-Gerasimenko. Astronomy and astrophysics, 588(L3), L3. EDP Sciences 10.1051/0004-6361/201527784

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Aims. We analyze the physical properties and dynamical origin of a curved jet of comet 67P/Churyumov-Gerasimenko that was observed repeatedly in several nucleus rotations starting on May 30 and persisting until early August, 2015. Methods. We simulated the motion of dust grains ejected from the nucleus surface under the influence of the gravity and viscous drag e ff ect of the expanding gas flow from the rotating nucleus. Results. The formation of the curved jet is a combination of the size of the dust particles (similar to 0.1-1 mm) and the location of the source region near the nucleus equator. This enhances the spiral feature of the collimated dust stream after the dust is accelerated to a terminal speed on the order of m s(-1).

Item Type:

Journal Article (Original Article)

Division/Institute:

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

UniBE Contributor:

Thomas, Nicolas

Subjects:

500 Science > 520 Astronomy
500 Science > 530 Physics
600 Technology > 620 Engineering

ISSN:

0004-6361

Publisher:

EDP Sciences

Language:

English

Submitter:

Katharina Weyeneth-Moser

Date Deposited:

17 Jul 2017 10:57

Last Modified:

23 Jul 2017 02:14

Publisher DOI:

10.1051/0004-6361/201527784

BORIS DOI:

10.7892/boris.96911

URI:

https://boris.unibe.ch/id/eprint/96911

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