论文标题
红色超级巨人中风的影响：干涉测量法建模
The effect of winds in red supergiants: modeling for interferometry
论文作者
论文摘要
红色超级巨人（RSGS）是在核心爆发超新星之前的阶段进化的巨大恒星。了解这些酷星的发展强度是理解我们宇宙的宇宙物质周期的关键，因为它们以新形成的元素丰富了宇宙。但是，触发大气中质量损失的物理过程仍未完全理解，并且仍然是恒星天体物理学中的关键问题之一。我们使用一种新方法来研究这些冷星的扩展大气，探索了一个简单的辐射平衡模型和一个半经验模型的恒星风的影响，该模型构成了色球温度结构。然后，我们可以计算非常大的望远镜干涉仪（VLTI）的不同工具的观测值的强度，通量和可见性。具体而言，与基于已发表的VLTI/Amber数据的HD 95687的大气结构进行比较时，我们发现我们的模型可以准确地匹配Kband中的这些观察结果，从而表明了这种方法的巨大潜力，可以再现RSG的扩展大气。
Red supergiants (RSGs) are evolved massive stars in a stage preceding core-collapse supernova. Understanding evolved-phases of these cool stars is key to understanding the cosmic matter cycle of our Universe, since they enrich the cosmos with newly formed elements. However, the physical processes that trigger mass loss in their atmospheres are still not fully understood, and remain one of the key questions in stellar astrophysics. We use a new method to study the extended atmospheres of these cold stars, exploring the effect of a stellar wind for both a simple radiative equilibrium model and a semi-empirical model that accounts for a chromospheric temperature structure. We then can compute the intensities, fluxes and visibilities matching the observations for the different instruments at the Very Large Telescope Interferometer (VLTI). Specifically, when comparing with the atmospheric structure of HD 95687 based on published VLTI/AMBER data, we find that our model can accurately match these observations in the Kband, showing the enormous potential of this methodology to reproduce extended atmospheres of RSGs.
