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

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 nucl...

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Detalhes bibliográficos
Autores: Lin, Zhong-Yi, Gutiérrez, Pedro J., Rodrigo Montero, Rafael, Kueppers, M., Lara, Luisa María, López-Moreno, José Juan, Rozek, A.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/146441
Acesso em linha:http://hdl.handle.net/10261/146441
Access Level:acceso abierto
Palavra-chave:Comets: individual: 67P/Churyumov-Gerasimenko
Descrição
Resumo: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 effect 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 (∼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. © ESO, 2016.

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