The distribution and source of boulders on asteroid 4179 Toutatis

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題名:	The distribution and source of boulders on asteroid 4179 Toutatis
作者:	葉永烜;Jiang, Yun;Ji, Jianghui;Huang, Jiangchuan;Marchi, Simone;Li, Yuan;Ip, Wing-Huen
貢獻者:	理學院天文研究所
關鍵詞:	Asteroids;Astronomical bodies;Boulders;Contributed Papers;Craters;Fragments;Information dissemination;Parents;Planetology
日期:	2016-01-01
上傳時間:	2026-04-21 14:46:35 (UTC+8)
出版者:	Cambridge University Press;Cambridge, UK: Cambridge University Press
摘要:	摘要： Boulders are ubiquitous on the surfaces of asteroids and their spatial and size distributions provide information for the geological evolution and collisional history of parent bodies. We identify more than 200 boulders on near-Earth asteroid 4179 Toutatis based on images obtained by Chang'e-2 flyby. The cumulative boulder size frequency distribution (SFD) gives a power-index of −4.4 ± 0.1, which is clearly steeper than those of boulders on Itokawa and Eros, indicating much high degree of fragmentation. Correlation analyses with craters suggest that most boulders cannot solely be produced as products of cratering, but are probably survived fragments from the parent body of Toutatis, accreted after its breakup. Similar to Itokawa, Toutatis probably has a rubble-pile structure, but owns a different preservation state of boulders. 其他題名： Proc. IAU 出版者： Cambridge, UK: Cambridge University Press 出版日期： 2015-08-01 出處： Proceedings of the International Astronomical Union, 2015-08, Vol.10 (S318), p.153-155 資源來源： Alma/SFX Local Collection 版權： Copyright © International Astronomical Union 2016 識別號： ISSN: 1743-9213 識別號： ISSN: 1743-9221 識別號： EISSN: 1743-9221 識別號： DOI: 10.1017/S1743921315007280
顯示於類別:	[天文研究所] 期刊論文

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