论文标题
爆炸受超新星无线电特性约束前不久，大规模氦星超新星祖细胞的质量损失
Mass loss of massive helium star supernova progenitors shortly before explosion constrained by supernova radio properties
论文作者
论文摘要
即使它在确定其残留的中子明星或黑洞肿块以及IBC型超级新星质量中起着至关重要的作用，大量氦星的质量损失也不是很好的。 IBC型超新星产生的无线电发射受其大规模氦星祖细胞质量损失形成的情节性质的强烈影响。在这项研究中，我们估计了无线电中IBC超新星的上升时间和峰值光度分布，基于一些巨大的氦气质量损失处方，并将它们与观察到的分布进行比较，以限制不确定的大规模氦气质量损失率。我们发现，普通IBC超新星祖细胞预期的亮度范围（4.6〜 <log l/lsun〜 <5.2）通常应具有较大的质量损失率（> 〜1e-6 msun/yr），以说明观察到的上升时间和峰值光度分布。因此，在此光度范围内预测氦星的质量损失率显着较低的质量损失处方与超新星无线电观察结果不一致。在爆炸爆炸前不久，大规模的氦气通常以与标准辐射驱动的风能机制不同的方式进行质量损失增强。
Mass loss of massive helium stars is not well understood even though it plays an essential role in determining their remnant neutron-star or black-hole masses as well as ejecta mass of Type Ibc supernovae. Radio emission from Type Ibc supernovae is strongly affected by circumstellar matter properties formed by mass loss of their massive helium star progenitors. In this study, we estimate the rise time and peak luminosity distributions of Type Ibc supernovae in radio based on a few massive helium star mass-loss prescriptions and compare them with the observed distribution to constrain the uncertain massive helium star mass-loss rates. We find that massive helium stars in the luminosity range expected for ordinary Type Ibc supernova progenitors (4.6 ~< log L/Lsun ~< 5.2) should generally have large mass-loss rates (> ~ 1e-6 Msun/yr) in order to account for the observed rise time and peak luminosity distribution. Therefore, mass-loss prescriptions that predict significantly low mass-loss rates for helium stars in this luminosity range is inconsistent with the supernova radio observations. It is also possible that massive helium stars shortly before their explosion generally undergo mass-loss enhancement in a different way from the standard radiation-driven wind mechanism.
