Dust production by impacts of interstellar dust on Edgeworth-Kuiper Belt objects
Dust production by impacts of interstellar dust on Edgeworth-Kuiper Belt objects
复制标题
星际尘埃撞击埃奇沃斯-柯伊伯带天体产生的尘埃
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
T. Mukai
中科院分区：
文献类型：
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作者：
S. Yamamoto;T. Mukai
我们估算了theimpactsofinterstellardustgrainsonEdgeworth-KuiperBelt天体尘埃颗粒的产生率。在这种情况下，撞击抛射物变成半径小于约10m的行星际尘埃粒子。如果EKOS有坚硬的冰面，并且有10 13个冰面，半径为0.1公里，则整个埃奇沃斯-柯伊伯带的总尘埃产生速率从3：7 10 5 GS 1到2：4 10 6 GS 1，取决于所采用的最小抛射速度(10 Cm S 1 10 3 Cm S 1)。如果EKOS表面覆盖一层半径小于入射尘埃粒子半径的冰粒，则总的尘埃产生速率略有增加，约为3：110 7GS 1。采用Stern(1996)使用的不同碰撞参数，得出EKOS相互碰撞产生半径小于10m的尘埃粒子的速率介于8：6×10~4GS_1和2：9×10~7GS_1之间。因此，由于撞击产生的粉尘
We estimated the production rate of dust grains by theimpactsofinterstellardustgrainsonEdgeworth-KuiperBelt objects (EKOs). In this scenario, the impact ejecta become in- terplanetary dust particles with radii smaller than about 10 m. If the EKOs have hard icy surfaces and there are 10 13 of these with radii 0.1 km, the total dust production rate over the entire Edgeworth-Kuiper Belt ranges from 3:7 10 5 gs 1 to 2:4 10 6 gs 1 , depending on the adopted minimum ejection velocity (10 cm s 1 10 3 cm s 1 ). If the surfaces of EKOs are covered by a layer of icy particles with radii smaller than those of the incident dust grains, then the total dust production rate is enhanced slightly to about 3:110 7 gs 1 . Adopting the dif- ferent collisional parameters used by Stern (1996), we nd that the production rate of dust grains with radii smaller than 10m by mutual collisions of EKOs is between 8:6 10 4 gs 1 and 2:9 10 7 gs 1 . Therefore dust production due to the impacts