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| 題名: | Gas outflow and dust transport of comet 67P/Churyumov-Gerasimenko |
| 作者: | 林忠義;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, Björn;Debei, Stefano;De Cecco, Mariolino;Deller, Jakob;Fornasier, Sonia;Fulle, Marco;Groussin, Olivier;Gutiérrez, Pedro J.;Güttler, Carsten;Hofmann, Marc;Hviid, Stubbe F.;Jorda, Laurent;Knollenberg, Jörg;Kovacs, Gabor;Kramm, J.-Rainer;Kührt, Ekkehard;Küppers, Michael;Lara, Luisa M.;Lazzarin, Monica;Lopez Moreno, Josè J.;Marzari, Francesco;Naletto, Giampiero;Oklay, Nilda;Shi, Xian;Tubiana, Cecilia;Vincent, Jean-Baptiste |
| 貢獻者: | 理學院天文研究所 |
| 關鍵詞: | Astrophysics;comets: general;comets: individual: comet 67P/Churyumov-Gerasimenko;Earth and Planetary Astrophysics;methods: numerical;Sciences of the Universe;Solar and Stellar Astrophysics |
| 日期: | 2016-01-01 |
| 上傳時間: | 2026-04-21 14:44:56 (UTC+8) |
| 出版者: | Oxford University Press;Oxford University Press (OUP) |
| 摘要: | 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.
出版者： Oxford University Press (OUP)
出版日期： 2016-11-01
出處： Monthly Notices of the Royal Astronomical Society, 2016-11, Vol.462 (Suppl_1), p.S533-546
資源來源： Alma/SFX Local Collection
版權： CC0 1.0 - Universal
識別號： ISSN: 0035-8711
識別號： ISSN: 1365-2966
識別號： ISSN: 1365-8711
識別號： EISSN: 1365-2966
識別號： DOI: 10.1093/mnras/stx332 |
| 顯示於類別: | [天文研究所] 期刊論文
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