標題: The spatial distribution of water in the inner coma of Comet 9P/Tempel 1: Comparison between models and observations
作者: Finklenburg, S.
Thomas, N.
Su, C. C.
Wu, J. -S.
機械工程學系
Department of Mechanical Engineering
關鍵字: Comet Tempel 1;Comet, coma;Comets, nucleus
公開日期: 1-七月-2014
摘要: The near nucleus coma of Comet 9P/Tempel 1 has been simulated with the 3D Direct Simulation Monte Carlo (DSMC) code PDSC++ (Su, C.-C. [2013]. Parallel Direct Simulation Monte Carlo (DSMC) Methods for Modeling Rarefied Gas Dynamics. PhD Thesis, National Chiao Tung University, Taiwan) and the derived column densities have been compared to observations of the water vapour distribution found by using infrared imaging spectrometer on the Deep Impact spacecraft (Feaga, L.M., A\'Hearn, M.F., Sunshine, J.M., Groussin, O., Farnham, T.L. [2007]. Icarus 191(2), 134-145. http://dx.doi.org/10.1016/j.icarus.2007.04.038). Modelled total production rates are also compared to various observations made at the time of the Deep Impact encounter. Three different models were tested. For all models, the shape model constructed from the Deep Impact observations by Thomas et al. (Thomas, P.C., Veverka, J., Belton, M.J.S., Hidy, A., A\'Hearn, M.F., Farnham, T.L., et al. [2007]. Icarus, 187(1), 4-15. http://dx.doi.org/10.1016/j.icarus.2006.12.013) was used. Outgassing depending only on the cosine of the solar insolation angle on each shape model facet is shown to provide an unsatisfactory model. Models constructed on the basis of active areas suggested by Kossacki and Szutowicz (Kossacki, K, Szutowicz, S. [2008]. Icarus, 195(2), 705-724. http://dx.doi.org/ 10.1016/j.icarus.2007.12.014) are shown to be superior. The Kossacki and Szutowicz model, however, also shows deficits which we have sought to improve upon. For the best model we investigate the properties of the outflow. (C) 2014 Elsevier Inc. All rights reserved.
URI: http://dx.doi.org/10.1016/j.icarus.2014.03.032
http://hdl.handle.net/11536/24393
ISSN: 0019-1035
DOI: 10.1016/j.icarus.2014.03.032
期刊: ICARUS
Volume: 236
Issue: 
起始頁: 9
結束頁: 23
顯示於類別:期刊論文


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  1. 000336477400002.pdf