Ejecta distribution from impact craters on Ryugu: Possible origin of the bluer units
Ejecta distribution from impact craters on Ryugu: Possible origin of the bluer units
复制标题
龙宫撞击坑的喷射物分布:蓝色单位的可能来源
DOI:
10.1016/j.icarus.2021.114474
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发表时间:
2021
期刊:
影响因子:
3.2
通讯作者:
Ikeya Ren
中科院分区:
文献类型:
--
作者:
Hirata Naoyuki;Ikeya Ren
Asteroid (162173) Ryugu was the first spinning-top-shaped asteroid to be closely approached by a probe, the Hayabusa2 spacecraft, which sent numerous high-resolution images of Ryugu to the Earth and revealed the nature of this type of asteroid. One of the notable features of Ryugu is the equatorial ridge, which is considered the result of rapid spin in the past. Despite the advanced age of the ridge, indicated by the presence of numerous craters, the ridge exhibits a bluish color, indicating that it is covered with fresh material. In addition to Ryugu, many other asteroids have similar blue areas, which are considered the result of ejecta emplacement. We examined the distribution of ejecta blankets from actual craters on Ryugu to assess ejecta emplacement as a possible origin of Ryugu's bluer units. We determined that when Ryugu's rotation was fast, ejecta from craters formed at lower latitudes accumulated along the equator, which may explain the bluish color of the equatorial ridge. On the other hand, ejecta emplacement does not fully explain the bluish color of Tokoyo Fossa, although we attempted to find the corresponding ejecta blankets.
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DOI:
--
发表时间:
1994
期刊:
--
影响因子:
--
作者:
R. Carlson;P. Weissman;M. Segura;L. Kamp;W. Smythe;T. Johnson;D. Matson;F. Leader;R. Mehlman;F. Fanale;J. Granaham;H. Kieffer;L. Soderblom;T. McCord
通讯作者:
T. McCord
影响因子:
2.4
作者:
L. Ksanfomality;S. Murchie;D. Britt;T. Duxbury;P. Fisher;N. Goroshkova;J. Head;E. Kuhrt;V. Moroz;B. Murray;G. E. Nikitin;E. Petrova;C. Pieters;A. Soufflot;A. Zharkov;B. Zhukov
通讯作者:
B. Zhukov
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
通讯作者:
--
影响因子:
3.2
作者:
J. Veverka;P. Helfenstein;P. Lee;P. Thomas;A. McEwen;M. Belton;K. Klaasen;T. Johnson;J. Granahan;F. Fanale;P. Geissler;J. Head
通讯作者:
J. Head
影响因子:
3.2
作者:
P. Thomas
通讯作者:
P. Thomas