快速质量转移过程中恒星磁场涌现的证据
Evidence for the emergence of stellar magnetic fields during rapid mass transfer
另 8 家 · 查看机构详情
- Royal Military College of Canada(加拿大皇家军事学院)
- Tel Aviv University(特拉维夫大学)
- Instituto de Astrofísica de Canarias(加那利群岛天体物理研究所)
- Universidad de La Laguna(拉帕鲁纳大学)
- Center for Computational Astrophysics, Flatiron Institute(平顿研究所计算天体物理学中心)
- Department of Astrophysical Sciences, Princeton University(普林斯顿大学天体物理科学系)
- Telus(泰卢公司)
- Uppsala University(乌普萨拉大学)
- KU Leuven(荷语鲁汶大学)
- Max Planck Institute for Astrophysics(马克斯·普朗克天体物理学研究所)
- Queen’s University(女王大学)
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中文总结 AI 辅助
通过观测Plaskett恒星,发现其磁性伴星的径向速度变化与轨道周期一致,证实了质量转移后构型,为双星相互作用引发强磁场涌现提供了新证据,并可能影响大质量双星演化及引力波源形成。
中文摘要 AI 辅助
双星相互作用从根本上改变了恒星大质量恒星的演化,然而质量转移的物理后果仍缺乏约束。本文展示了Plaskett恒星(HD 47129)的高分辨率光谱观测,揭示了其磁性伴星的小幅径向速度变化,这些变化与系统14.4天的轨道周期相吻合。这些测量支持一个演化的、质量转移后的构型,其中窄线主星是一颗部分充满洛希瓣的剥离恒星,质量为$5.9^{+1.8}_{-1.4},M_\odot$,而伴星是一颗质量为$40.8^{+9.3}_{-6.7},M_\odot$的快速旋转磁性吸积星。该系统提供了一个罕见的机会来观察大质量双星中质量转移的直接后果,并提供了令人信服的新证据,将双星相互作用与强恒星磁场的涌现联系起来。由于磁场调节角动量损失和输运,通过质量转移形成的磁场可能改变大质量双星的后续演化,对恒星种群、超新星前身星及其产率以及引力波源的形成产生影响。
英文摘要
Binary interaction fundamentally alters the evolution of massive stars, yet the physical consequences of mass transfer remain poorly constrained. Here we present high-resolution spectroscopic observations of Plaskett's Star (HD 47129) that reveal small radial-velocity variations of its magnetic secondary, coherent with the system's 14.4 d orbital period. These measurements support an evolved, post-mass-transfer configuration in which the narrow-lined primary is a partially Roche-lobe-filling stripped star with a mass of $5.9^{+1.8}_{-1.4},M_\odot$, while the secondary is a $40.8^{+9.3}_{-6.7},M_\odot$, rapidly rotating magnetic accretor. The system provides a rare opportunity to observe the immediate aftermath of mass transfer in a massive binary and offers compelling new evidence linking binary interaction to the emergence of strong stellar magnetism. Because magnetic fields regulate angular-momentum loss and transport, their formation through mass transfer could alter the subsequent evolution of massive binaries, with consequences for stellar populations, supernova progenitors and yields, and the formation of gravitational-wave sources.