Time Resolved Studies of Outflows from Massive Sta

该小组将使用亚利桑那州和智利的望远镜收集大质量恒星排出气体和尘埃的数据。这些物质最终会在新的恒星和行星形成区域循环利用。研究人员将测量两组恒星的恒星风变化：有磁场的恒星和双星系统的恒星。他们将进行从数小时到数年不等的观测，以检验质量损失模型。他们还将为本科生开发易于使用的软件工具，使他们更容易学习如何做研究。来自佛罗里达州和田纳西州的研究人员将合作完成这项工作，其中包括学生和一名博士后研究员。该团队将使用中等大小的高分辨率望远镜（R=20,000）上的光学梯队光谱仪，研究具有碰撞风的OB磁星和几个早期型双星，专用时间为210晚。观测结果将提供相当于15公里/秒的速度分辨率，这个分辨率足够高，可以看到大质量恒星发射线的详细结构，这些发射线通常宽1000-3000公里/秒。他们将利用这些数据来测试基于磁化风模拟的磁层发射模型。他们还将监测各种各样的大型对撞风双星，以量化和模拟周期性和非周期性行为。该团队将使用南方天文学研究协会（SARA）的望远镜，该协会是由12所大学组成的联盟。

This team will use telescopes in Arizona and Chile to collect data on massive stars expelling gas and dust. Such material is eventually recycled in new star and planet forming regions. The researchers will measure stellar wind variability in two groups of stars: those with magnetic fields and those in binary systems. They will carry out observations ranging from hours to years to test mass loss models. They will also develop easy-to-use software tools for undergraduate students, making it easier for them to learn how to do research. Researchers from Florida and Tennessee will collaborate to complete the work, including students and a postdoctoral researcher.The team will use optical echelle spectrographs on moderate-sized telescopes with high resolving power (R=20,000) to study magnetic OB stars and several early-type binaries with colliding winds for 210 nights of dedicated time. The observations will provide equivalent velocity resolution of 15 km/s, which is high enough to see detailed structure in the massive star emission lines which are typically 1000-3000 km/s wide. They will use the data to test models of magnetospheric emission based on simulations of magnetized winds. They will also monitor a diverse selection of massive colliding wind binaries to quantify and model periodic and non-periodic behavior. The team will use telescopes in the Southern Association for Research in Astronomy (SARA), which is a consortium of 12 universities.