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arXiv 2408.16745astro-ph.GA
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银河系中心新发现南纬度非热纤维的 VLA 研究:偏振与磁场性质

A VLA Study of Newly-Discovered Southern Latitude Non-Thermal Filaments in the Galactic Center: Polarimetric and Magnetic Field Properties

Dylan M. Pare, Cornelia C. Lang, Mark R. Morris

AI总结:

本文利用VLA对银河系中心新发现的一组暗弱非热纤维进行偏振研究,导出其偏振强度、旋转测量和内禀磁场分布,并与已知结果对比,以增进对大尺度偏振性质的理解并约束相对论性电子产生机制模型。

摘要:

银河系中心(GC)特有的一类结构,即非热纤维(NTFs),已被研究了40多年,但仍有许多未知之处。特别是,对于照亮这些结构的相对论性电子是如何产生的,目前尚无被广泛接受且统一的理解。一种可能性是存在紧凑和延展的宇宙射线(CRs)源,它们沿磁通管扩散,通过同步辐射照亮NTFs。在本工作中,我们展示并讨论了GC中一组此前仅在总强度上被研究过的暗弱NTFs的偏振分布。我们将这些结构导出的偏振强度、旋转测量和内禀磁场分布与先前观测到的GC NTFs的结果进行了比较。这些结果随后被用于增进我们对GC大尺度偏振性质的理解。接着,我们利用导出的偏振分布来约束照亮这些结构的相对论性电子产生机制的模型。

英文摘要:

A population of structures unique to the Galactic Center (GC), known as the non-thermal filaments (NTFs), has been studied for over 40 years, but much remains unknown about them. In particular, there is no widely-accepted and unified understanding for how the relativistic electrons illuminating these structures are generated. One possibility is that there are compact and extended sources of Cosmic Rays (CRs), which then diffuse along magnetic flux tubes leading to the illumination of the NTFs through synchrotron emission. In this work, we present and discuss the polarimetric distributions associated with a set of faint NTFs in the GC that have only been studied in total intensity previously. We compare the derived polarized intensity, rotation measure, and intrinsic magnetic field distributions for these structures with the results obtained for previously observed GC NTFs. The results are then used to enhance our understanding of the large-scale polarimetric properties of the GC. We then use the derived polarimetric distributions to constrain models for the mechanisms generating the relativistic electrons that illuminate these structures.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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