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1.	Lai, Ian-Lin, et al. (author) Gas outflow and dust transport of comet 67P/Churyumov-Gerasimenko 2016 In: Monthly notices of the Royal Astronomical Society. - : OXFORD UNIV PRESS. - 0035-8711 .- 1365-2966. ; 462, s. S533-S546 Journal article (peer-reviewed)abstract 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.

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Type of publication: journal article (1)

Type of content: peer-reviewed (1)

Author/Editor: Agarwal, Jessica (1); Rickman, Hans (1); Thomas, Nicolas (1); Kovacs, Gabor (1); Davidsson, Björn (1); Gutierrez, Pedro J. (1); show more...; Bertaux, Jean-Loup (1); Ip, Wing-Huen (1); Lin, Zhong-Yi (1); Bertini, Ivano (1); Marzari, Francesco (1); Tubiana, Cecilia (1); Barbieri, Cesare (1); Sierks, Holger (1); Fulle, Marco (1); Shi, Xian (1); Cremonese, Gabriele (1); Fornasier, Sonia (1); Oklay, Nilda (1); Da Deppo, Vania (1); Groussin, Olivier (1); Jorda, Laurent (1); A'Hearn, Michael F. (1); Koschny, Detlef (1); Lara, Luisa M. (1); Hviid, Stubbe F. (1); Lamy, Philippe (1); Küppers, Michael (1); Kührt, Ekkehard (1); Vincent, Jean-Baptis ... (1); Lazzarin, Monica (1); Keller, Horst Uwe (1); Rodrigo, Rafael (1); Lai, Ian-Lin (1); Su, Cheng-Chin (1); Wu, Jong-Shinn (1); Lee, Jui-Chi (1); Liao, Ying (1); Barucci, Maria Anton ... (1); Boudreault, Steven (1); Debei, Stefano (1); De Cecco, Mariolino (1); Deller, Jakob (1); Guttler, Carsten (1); Hofmann, Marc (1); Knollenberg, J. Org (1); Kramm, J. -Rainer (1); Moreno, Jose J. Lope ... (1); Naletto, Giampiero (1); show less...

University: Uppsala University (1)

Language: English (1)

Research subject (UKÄ/SCB): Natural sciences (1)

Year: 2016 (1)

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