论文标题
风向模型：应用于特殊的瞬变AT2018COW和IPTF14HLS
A Wind-Driven Model: Application to Peculiar Transients AT2018cow and iPTF14hls
论文作者
论文摘要
我们提出了一个针对特殊瞬变的风驱动模型，并将该模型应用于AT2018COW和IPTF14HL。在风驱动的模型中，我们假设像恒星风一样从中央系统注入恒星风。尽管这些瞬态具有不同的观察特性，但该模型可以解释其光度特性，这些特性并非由超新星样瞬时爆炸复制。此外，该模型可以预测特征光谱特征和进化，这与AT2018 -COW和IPTF14HL的特征非常吻合。尽管有不同的观测特性，但风模型表明它们具有一些共同的特征。较大的质量率（最高$ \ sim 20m _ {\ odot} {\ rm〜 yr^{ - 1}} $对于at2018cow和$ \ sim 75m _ {\ odot} {\ rm〜yr^yr^yr^yr^{ - 1}} $ sim for Iptf14hls and $ rm〜yr^yr^yr^yr^yr^yr^yr^yr 〜yr^yr 〜yr^yr〜yr 〜yr^yrs） 10^{13} {\ rm〜cm} $用于发射风。这表明两者都可能与涉及红色超级巨人（RSG）的事件有关，其中RSG信封在恒星核心尺度上被事件迅速弹出。另一方面，主要差异是动能，总弹出质量和时间尺度。然后，我们建议IPTF14HL可能代表由大型二进制系统引起的动态公共 - 内玻璃演化（$ \ sim 120m _ {\ odot}+100m _ {\ odot} $）。 AT2018COW可能是黑洞（BH）低质量RSG的潮汐破坏事件，或者是形成BH的超新星。
We propose a wind-driven model for peculiar transients, and apply the model to AT2018cow and iPTF14hls. In the wind-driven model, we assume that a continuous outflow like a stellar wind is injected from a central system. While these transients have different observational properties, this model can explain their photometric properties which are not reproduced by a supernova-like instantaneous explosion. Furthermore, the model predicts characteristic spectral features and evolution, which are well in line with those of AT2018cow and iPTF14hls. Despite the different observational properties, the wind model shows that they have some common features; the large mass-loss rates (up to $\sim 20M_{\odot}{\rm ~yr^{-1}}$ for AT2018cow and $\sim 75M_{\odot}{\rm ~yr^{-1}}$ for iPTF14hls), and the characteristic radii of $\sim 10^{13}{\rm ~cm}$ for the launch of the wind. It would indicate that both may be related to events involving a red super giant (RSG), in which the RSG envelope is rapidly ejected by an event at a stellar core scale. On the other hand, the main differences are the kinetic energies, the total ejected mass, and time scales. We then suggest that iPTF14hls may represent a dynamical common-envelope evolution induced by a massive binary system ($\sim 120M_{\odot}+100M_{\odot}$). AT2018cow may be either a tidal disruption event of a low-mass RSG by a black hole (BH), or a BH-forming failed supernova.
