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arXiv 1406.7859astro-ph.GA
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银河系中心磁场的表现

Manifestations of the Galactic Center Magnetic Field

Mark R. Morris

摘要:

几个独立的证据表明,一个相对强大的和高度有序的磁场是目前整个银河系的中央分子区(CMZ)。中心分子带的密云内的磁场主要平行于银河平面,这可能是该区域强烈的潮汐切变的结果。第二个磁场系统存在于云层之外,主要表现为与该场对齐的垂直同步辐射特征群。这个强大的垂直磁场是否在整个CMZ中是均匀的还不确定,但这是整个能量学的关键核心问题,也是这个磁场对银河系中心舞台的影响。考虑了两个场系统之间的相互作用,因为它们可能驱动CMZ内的一些活动。作为本星系群及更远星系群中其他富含气体的星系的代表,银河系中心区域揭示了磁场可能是一个重要的诊断,如果不是准直器的话,风和高能粒子从核中流出。

英文摘要:

Several independent lines of evidence reveal that a relatively strong and highly ordered magnetic field is present throughout the Galaxy's central molecular zone (CMZ). The field within dense clouds of the central molecular zone is predominantly parallel to the Galactic plane, probably as a result of the strong tidal shear in that region. A second magnetic field system is present outside of clouds, manifested primarily by a population of vertical, synchrotron-emitting filamentary features aligned with the field. Whether or not the strong vertical field is uniform throughout the CMZ remains undetermined, but is a key central issue for the overall energetics and the impact of the field on the Galactic center arena. The interactions between the two field systems are considered, as they are likely to drive some of the activity within the CMZ. As a proxy for other gas-rich galaxies in the local group and beyond, the Galactic center region reveals that magnetic fields are likely to be an important diagnostic, if not also a collimator, of the flow of winds and energetic particles out of the nucleus.

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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