標題: Gas outflow and dust transport of comet 67P/Churyumov-Gerasimenko
作者: Lai, Ian-Lin
Ip, Wing-Huen
Su, Cheng-Chin
Wu, Jong-Shinn
Lee, Jui-Chi
Lin, Zhong-Yi
Liao, Ying
Thomas, Nicolas
Sierks, Holger
Barbieri, Cesare
Lamy, Philippe
Rodrigo, Rafael
Koschny, Detlef
Rickman, Hans
Keller, Horst Uwe
Agarwal, Jessica
A'Hearn, Michael F.
Barucci, Maria Antonella
Bertaux, Jean-Loup
Bertini, Ivano
Boudreault, Steven
Cremonese, Gabriele
Da Deppo, Vania
Davidsson, Bjorn
Debei, Stefano
De Cecco, Mariolino
Deller, Jakob
Fornasier, Sonia
Fulle, Marco
Groussin, Olivier
Gutierrez, Pedro J.
Guttler, Carsten
Hofmann, Marc
Hviid, Stubbe F.
Jorda, Laurent
Knollenberg, J. Org
Kovacs, Gabor
Kramm, J. -Rainer
Kuhrt, Ekkehard
Kuppers, Michael
Lara, Luisa M.
Lazzarin, Monica
Moreno, Jose J. Lopez
Marzari, Francesco
Naletto, Giampiero
Oklay, Nilda
Shi, Xian
Tubiana, Cecilia
Vincent, Jean-Baptiste
機械工程學系
Department of Mechanical Engineering
關鍵字: methods: numerical;comets: general;comets: individual: comet 67P/Churyumov-Gerasimenko
公開日期: 1-Nov-2016
摘要: Because of the diurnal thermal cycle and the irregular shape of the nucleus, gas outflow of comet 67P/Churyumov-Gerasimenko could be highly anisotropic as indicated by the colliminated dust jet structures on the sunlit side. Based on the OSIRIS imaging observations of the outgassing effect, a simple model of surface sublimation can be constructed by taking into account the dependence on the solar insolation. With preliminary information on the time variability of the global gas production rate, a sequence of gas coma models can be generated at different epochs before and after perihelion. We also investigate different patterns of dust particle dynamics under the influences of nuclear rotation and gas drag. From these considerations, a consistent picture of the spatial distribution of dusty materials across the surface of comet 67P as it moves around the perihelion can be developed. It is found that because of the redeposition of the ejected dust from the Southern hemisphere to the Northern hemisphere during the southern summer season the Hapi region could gain up to 0.4 m while the Wosret region would lose up to 1.8 m of dust mantle per orbit.
URI: http://dx.doi.org/10.1093/mnras/stx332
http://hdl.handle.net/11536/145623
ISSN: 0035-8711
DOI: 10.1093/mnras/stx332
期刊: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume: 462
起始頁: 0
結束頁: 0
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