Dynamics of Plasma-Dust Interactions in the F-Corona and Interplanetary Shock Waves

F-日冕和行星际冲击波中等离子体-尘埃相互作用的动力学

• 批准号: 9016439
• 负责人: Nebil Misconi
• 金额: $ 12万
• 依托单位: Florida Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-01-15 至 1993-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9016439&HistoricalAwards=false
• 关键词: Dynamics; Plasma; Dust; Interactions; Corona

This study will attempt to determine the essential properties of the coronal force field and its interaction with circumsolar dust, including ion drag and Coulomb drag from the solar wind plasma, sudden orbital changes during coronal mass ejections, interaction of the local magnetic field with the electric charge on the dust particles, and orbital changes due to evaporation and sputtering. These studies will attempt to determine whether these orbital changes give rise to the observed dust "rings" around the sun, and how the distribution of dust relates to solar activity. These relationships will allow observations of F-coronal dust, such as those to be carried aboard the Solar Heliospheric Observatory spacecraft, to be used as an indicator of the coronal plasma environment. Numerical simulations of the dynamical evolution of dust particles released from comets and asteroids will be carried out. These computations will form the basis for identifying the source distribution of coronal dust. Calculations of the force field in the F-corona, and the numerical techniques and analytical solutions developed and refined here, will provide powerful tools in a wide range of non-Keplerian dynamical problems, such as cometary dynamics and disintegration, planetary accretion, stability of asteroidal satellite orbits, and interrelations between the distribution of dust and solar activity. This work also relates to studies outside the solar system, including stars with dust envelopes, plasma-dust interactions in flare stars, and dust escaping stellar systems into the interstellar medium.

这项研究将试图确定日冕力场及其与太阳周围尘埃相互作用的基本特性，包括太阳风等离子体的离子阻力和库仑阻力，日冕物质抛射期间的突然轨道变化，局部磁场与尘埃粒子上的电荷的相互作用。轨道由于蒸发和溅射而改变。这些研究将试图确定这些轨道变化是否导致了太阳周围观测到的尘埃“环”，以及尘埃的分布与太阳活动的关系。这些关系将允许对f -日冕尘埃的观测，例如那些将携带在太阳日球层天文台航天器上的观测，被用作日冕等离子体环境的指示器。将对彗星和小行星释放的尘埃粒子的动力学演化进行数值模拟。这些计算将成为确定日冕尘埃来源分布的基础。f -日冕力场的计算，以及这里发展和完善的数值技术和解析解，将为广泛的非开普勒动力学问题提供强大的工具，如彗星动力学和解体，行星吸积，小行星卫星轨道的稳定性，以及尘埃分布和太阳活动之间的相互关系。这项工作也与太阳系外的研究有关，包括有尘埃包层的恒星，耀斑恒星中的等离子体-尘埃相互作用，以及逃离恒星系统进入星际介质的尘埃。