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

该项目的目标是评估连续极化测量的潜力，以限制磁场对分子云中恒星形成的影响。本文的研究重点是分析多波长高空间分辨率连续偏振测量在分子云内部和环境磁场多尺度结构约束中的潜力。通过磁流体动力学模拟和随后的三维辐射传输模拟，我们将利用分子云和云核中自一致的模拟密度、温度、速度和磁场结构，超越该领域以前的方法。此外，将应用目前发展的考虑各向异性辐射场（例如来自嵌入恒星的辐射场）影响的晶粒对准理论。不同类型的连续极化机制，可以跟踪在光学到毫米波长，以及这些和其他可观测到的不同波长制度之间的相关性将被考虑。本研究的结果将为约束分子云中多尺度磁场形态所需的极化测量的精度、光谱覆盖和空间分辨率提供约束。

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.