Elliptical dust growth in astrophysical plasmas
Elliptical dust growth in astrophysical plasmas
复制标题
天体物理等离子体中的椭圆尘埃生长
DOI：
10.1051/0004-6361:20064922
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发表时间：
2006
影响因子：
6.5
通讯作者：
D. Diver
中科院分区：
文献类型：
--
作者：
C. Stark;H. Potts;D. Diver
天体物理等离子体中存在细长的尘埃颗粒。如果沉积的离子是非惯性的，则通过等离子体沉积，会发生椭圆形尘埃颗粒的各向异性生长。实际上，这种生长的程度取决于离子的初始动能和鞘层中电场的大小。报告了鞘中离子动力学的模拟，显示了椭圆形生长如何与相对于鞘长度的种子的初始偏心率和尺寸相关。然后讨论椭圆尘埃最终命运的后果。
Elongated dust grains exist in astrophysical plasmas. Anisotropic growth of elliptical dust grains, via plasma deposition, occurs if the deposited ions are non-inertial. In reality the extent of such growth depends upon the initial kinetic energy of the ions and the magnitude of the electric field in the sheath. Simulations of the dynamics of the ions in the sheath are reported, showing how elliptical growth is related to the initial eccentricity and size of the seed relative to the sheath length. Consequences for the eventual fate of elliptical dust are then discussed.