Impact-generated dust clouds around planetary satellites: asymmetry effects
- 作者：Sremcevic ; Miodrag ; Krivov ; Alexander V. ; Spahn ; Frank
- 关键词：Interplanetary dust ; Micrometeoroids ; Impact processes ; Planetary satellites ; Orbital dynamics
- 刊名：Planetary and Space Science
- 出版年：2003
- 期刊代码：60_00320633
- 类别：ph
- 出版时间：June - July, 2003
- 卷：51
- 期：7-8
- 页码：455-471
- 文件大小：555 K
摘要
In a companion paper (Krivov et al., Impact-generated dust clouds around planetary satellites: spherically symmetric case, Planet. Space. Sci. 2003, 51, 251–269) an analytic model of an impact-generated, steady-state, spherically symmetric dust cloud around an atmosphereless planetary satellite (or planet—Mercury, Pluto) has been developed. This paper lifts the assumption of spherical symmetry and focuses on the asymmetry effects that result from the motion of the parent body through an isotropic field of impactors. As in the spherically symmetric case, we first consider the dust production from the surface and then derive a general phase-space distribution function of the ensemble of ejected dust motes. All quantities of interest, such as particle number densities and fluxes, can be obtained by integrating this phase-space distribution function.