Unveiling the multi-scale structure of the magnetic field in the interior and the environment of molecular clouds

揭示分子云内部和环境磁场的多尺度结构

• 批准号: 203090665
• 负责人: Professor Dr. Sebastian Wolf
• 金额: --
• 依托单位: Hamburger Sternwarte
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/203090665?language=en
• 关键词: Unveiling; multi; scale; structure; magnetic

The goal of this project is to evaluate the potential of continuum polarization measurements to constrain the impact of magnetic fields on star-formation in molecular clouds.The current proposal is focused on the analysis of the potential of multi-wavelength high-spatial resolution continuum polarization measurements for constraining the multi-scale structure of magnetic fields in the interior and the environment of molecular clouds. We will go beyond previous approaches in this field by making use of the self-consistently simulated density, temperature, velocity, and magnetic field structure in molecular clouds and cloud cores, resulting from magneto-hydrodynamical simulations and subsequent three-dimensional radiative transfer simulations. Furthermore, currently developed grain alignment theories, considering the effect of anisotropic radiation fields, e.g., originating from embedded stars, will be applied. Different types of continuum polarization mechanisms which can be traced at optical to millimeter wavelengths will be considered as well as correlations between these and other observables in the different wavelength regimes. The results of this study will provide constraints for the accuracy, spectral coverage, and spatial resolution of polarization measurements required to constrain the multi-scale magnetic field morphology in molecular clouds.

该项目的目标是评估连续偏振测量在限制磁场对分子云中恒星形成的影响方面的潜力，目前的建议侧重于分析多波长高空间分辨率连续偏振测量在限制分子云内部和环境磁场多尺度结构方面的潜力。我们将超越以前的方法在这一领域利用自洽模拟密度，温度，速度和磁场结构的分子云和云核，导致磁流体动力学模拟和随后的三维辐射传输模拟。此外，目前发展的晶粒排列理论，考虑到各向异性辐射场的影响，来自嵌入式恒星的，将被应用。不同类型的连续偏振机制，可以追溯到在光学毫米波长将被视为以及这些和其他观测值之间的相关性，在不同的波长制度。这项研究的结果将提供约束的准确性，光谱覆盖范围，和空间分辨率的偏振测量所需的约束分子云中的多尺度磁场形态。