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http://hdl.handle.net/20.500.12386/24634
Titolo: | Gas outflow and dust transport of comet 67P/Churyumov-Gerasimenko | Autori: | 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 |
Data pubblicazione: | 2016 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 462 | Da pagina:: | S533 | 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. | URI: | http://hdl.handle.net/20.500.12386/24634 | URL: | https://academic.oup.com/mnras/article/462/Suppl_1/S533/2978043 | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stx332 | Bibcode ADS: | 2016MNRAS.462S.533L | Fulltext: | open |
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