论文标题
NGC 1624-2的新观察结果揭示了复杂的磁层结构和下面的表面磁几何形状
New observations of NGC 1624-2 reveal a complex magnetospheric structure and underlying surface magnetic geometry
论文作者
论文摘要
NGC 1624-2是已知最强的O型恒星。以前对紫外线中该物体的光谱观察结果提供了证据，表明它具有较大且密集的杂质磁层。使用\ textit {Hubble Space望远镜}获得的后续观察不仅确认了先前的推断，而且还表明NGC 1624-2的磁层具有复杂的结构。此外，扩展的光谱时间序列序列显示出与偶极磁场几何形状的潜在偏离，这可能意味着在O型恒星表面检测到的最强场也在拓扑上是复杂的。该结果提出了有关大型恒星中磁场的起源和演变的重要问题。
NGC 1624-2 is the most strongly magnetized O-type star known. Previous spectroscopic observations of this object in the ultraviolet provided evidence that it hosts a large and dense circumstellar magnetosphere. Follow-up observations obtained with the \textit{Hubble Space Telescope} not only confirm that previous inference, but also suggest that NGC 1624-2's magnetosphere has a complex structure. Furthermore, an expanded spectropolarimetric time series shows a potential departure from a dipolar magnetic field geometry, which could mean that the strongest field detected at the surface of an O-type star is also topologically complex. This result raises important questions regarding the origin and evolution of magnetic fields in massive stars.
