The potential of multi-wavelength polarization measurements to constrain the magnetic field in protoplanetary disks

多波长偏振测量限制原行星盘磁场的潜力

• 批准号: 389368861
• 负责人: Professor Dr. Sebastian Wolf
• 金额: --
• 依托单位: Institut für Theoretische Physik und Astrophysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/389368861?language=en
• 关键词: potential; multi; wavelength; polarization; measurements

The goal of this project is to study the feasibility to constrain the strength and structure of the magnetic field in protoplanetary disks from multi-wavelength polarization observations. These constraints are urgently required to verify the theoretically predicted impact of magnetic fields on the process of planet formation.There is a threefold motivation for the proposed study:(A) Magnetic fields are predicted to play a keyrole in the evolution of circumstellar disks and the formation of planets therein. However, these predictions which have been primarily derived from numerous magneto-hydrodynamic simulations are yet observationally largely unconstrained.(B) Since recently, state-of-the-art polarimeters/observatories covering a broad wavelength range (near-infrared/submillimeter/millimeter) are available which allow highly sensitive, high-angular resolution polarimetric observations of protoplanetary disks.(C) Since there exist various mechanisms that can cause the observed polarization in circumstellar disks, it is necessary to carefully identify which combination of complementary polarimetric observations indeed allows one to derive unique constraints on the magnetic field.

该项目的目标是研究通过多波长偏振观测来约束原行星盘中磁场强度和结构的可行性。为了验证磁场对行星形成过程的理论预测的影响，迫切需要这些约束。这项拟议的研究有三个动机：(A)预测磁场将在环绕星盘的演化和其中行星的形成中发挥关键作用。然而，这些预测主要是从大量的磁流体动力学模拟中得出的，在很大程度上还没有受到观测的限制。(B)自最近以来，覆盖宽波长范围(近红外/亚毫米/毫米)的最先进的偏振仪/观测站可以对原行星盘进行高灵敏度、高角度分辨率的偏振观测。(C)由于存在各种机制可以导致在环绕星盘中观察到的极化，因此有必要仔细确定互补的偏振观测的哪一种组合确实允许人们得出对磁场的独特约束。