论文标题
狼射线星：最近的进步和持续存在的问题
Wolf-Rayet stars: recent advances and persisting problems
论文作者
论文摘要
沃尔夫射线（WR）恒星组成了一类恒星，其光谱由强大的发射线与大量质量损失相关。在大型明星制度中，大约90％的已知WR恒星被认为是从主序列中演变而来的。这些耗尽的氢化物体被称为经典WR（CWR）星，代表了核心崩溃之前的至关重要的进化阶段，并为热星物理学提供了独特的窗口。它们的形成被认为植根于固有的质量损失或二元相互作用。通过使用当代模型大气分析获得的结果仍然无法调和WR恒星的衍生特性与恒星进化的预测。重要的是，恒星进化模型无法再现大部分CWR星星，这一问题在属极金属性下变得尤为严重。下一代模型的气氛和即将举行的观察活动，以寻找未发现的同伴有望取得进步的场所。
Wolf-Rayet (WR) stars comprise a class of stars whose spectra are dominated by strong, broad emission lines that are associated with copious mass loss. In the massive-star regime, roughly 90% of the known WR stars are thought to have evolved off the main sequence. Dubbed classical WR (cWR) stars, these hydrogen-depleted objects represent a crucial evolutionary phase preceding core collapse into black holes, and offer a unique window into hot-star wind physics. Their formation is thought to be rooted in either intrinsic mass-loss or binary interactions. Results obtained from analyses using contemporary model atmospheres still fail to reconcile the derived properties of WR stars with predictions from stellar evolution. Importantly, stellar evolution models cannot reproduce the the bulk of cWR stars, a problem that becomes especially severe at subsolar metallicity. Next-generation model atmospheres and upcoming observational campaigns to hunt for undetected companions promise a venue for progress.
