Project P1: Masses and stirring of debris disks

项目 P1：碎片盘的质量和搅拌

• 批准号: 278210982
• 负责人: Professor Dr. Alexander Krivov
• 金额: --
• 依托单位: Lunar and Planetary Laboratory
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/278210982?language=en
• 关键词: Project; P1; Masses; stirring; debris

The aim of the proposed project is to extend our knowledge of planetary systems harboring debris disks with the help of state-of-the-art collisional models. Our preliminary work has demonstrated that an in-depth collisional modeling is a very powerful tool to decipher information encrypted in the observed dust emission and stellar light scattered by dust in debris disks. Such a modeling is necessary to "climb the ladder of the collisional cascade" from dust to its parent bodies, directly unobservable planetesimals. In this way, various parameters of the planetesimal belts can be inferred. These include location and mass of planetesimal belts, their size and radial distribution, degree of dynamical excitation, mechanical properties and material composition, and others. We should also be able to place constraints on the alleged planets that sculpt and stir the planetesimal belts, as well as certain parameters of the central star, for instance the expected level of chromospheric emission or strength of the stellar winds that all affect the dust distribution and excess emission. Ultimately, one can attempt to roughly restore the formation history of the debris disk systems. The project foresees both a further development of the modeling codes and their application to a handful of selected debris disk systems. Both will be done in a close collaboration with the projects P4-P9 that will provide key ingredients for the collisional models and the calculation of observables.

该项目的目的是借助最先进的碰撞模型来扩展我们对含有碎片盘的行星系统的了解。我们的初步工作表明，深入的碰撞建模是一种非常强大的工具，可以破译在观测到的尘埃发射和碎片盘中尘埃散射的恒星光中加密的信息。这种建模对于从尘埃到其母体（直接不可观测的星子）“攀登碰撞级联的阶梯”是必要的。这样就可以推断出星子带的各种参数。这些包括星子带的位置和质量、它们的尺寸和径向分布、动态激发程度、机械性能和材料成分等。我们还应该能够对所谓的塑造和搅动星子带的行星以及中心恒星的某些参数进行限制，例如色球发射的预期水平或恒星风的强度，这些都会影响尘埃的分布和过量的排放。最终，人们可以尝试粗略地恢复碎片盘系统的形成历史。该项目预计建模代码的进一步开发及其在少数选定碎片磁盘系统中的应用。两者都将与 P4-P9 项目密切合作完成，该项目将为碰撞模型和可观测值的计算提供关键要素。