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一个可能的开普勒盘养一个光学显示的巨大的年轻恒星
Anna F McLeod1,2, Pamela D Klaassen3, Megan Reiter4
1Centre for Extragalactic Astronomy, Department of Physics, Durham University, Durham, UK. anna.mcleod@durham.ac.uk.
Nature
|November 29, 2023
概括
天文学家发现了一个外星系巨型年轻恒星物体 (MYSO) 具有旋转盘,挑战形成模型. 大麦哲伦云中的光学显现的MYSO表明低金属度的环境影响了巨大的恒星进化.
科学领域:
- 天文学与天体物理学
- 恒星形成
- 银河系外的天文学
背景情况:
- 大规模的年轻恒星物体 (MYSOs) 通常通过盘介导的积聚形成,在我们的银河系中观察到开普勒盘和喷射.
- 在此之前,所有已知的MYSO系统都被发现嵌入在银河系的原始物质中.
- 巨大的恒星的形成和演化,特别是在银河系外的环境中,仍然是活跃的研究领域.
研究的目的:
- 调查外星系MYSO周围旋转的气体结构的存在和特征.
- 将银河系外MYSOs的形成环境和积累过程与银河系的形成环境和积累过程进行比较.
- 为巨大的恒星形成和演变提供理论模型的观测约束.
主要方法:
- 在大麦哲伦云中检测到围绕银河系外MYSO旋转的气体结构.
- 分析气体运动以推断中心盘状结构内的辐射流入和凯普勒旋转.
- 观测到的银河系外MYSO系统与已知的银河系MYSO系统的比较.
主要成果:
- 一个旋转的气体结构,标志着一个开普勒盘,被检测到外星系MYSO.
- 该系统显示了从更大的尺度到中央积累盘的物质流入的证据,类似于银河系MYSOs.
- 超银河系的MYSO在光学上被揭示出来,
结论:
- 这些发现表明,巨大的恒星形成与开普勒积累盘发生在银河系外的环境.
- 这种MYSO的光学可见性表明,低金属度和低尘埃环境可能导致不同的形成路径或观测特征.
- 这些结果挑战了MYSOs嵌入性质的普遍性,
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