Time Resolved Studies of Outflows from Massive Stars using the Observatory of the Southeastern Association for Research in Astronomy

这个团队将使用亚利桑那州和智利的望远镜来收集大质量恒星喷出气体和尘埃的数据。这种物质最终会在新的恒星和行星形成区域回收利用。研究人员将测量两组恒星的恒星风变化：一组是磁场恒星，另一组是双星系统恒星。他们将进行从几小时到几年的观测，以测试质量损失模型。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进行研究。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人员。该团队将使用中等大小高分辨率望远镜(R=20000)上的光学梯形光谱仪，在210个晚上的专门时间内研究磁性双星和几个早期的具有碰撞风的双星。观测将提供相当于15公里/S的速度分辨率，这足以看到通常为1000-3000公里/S宽的大质量恒星发射线的详细结构。他们将使用这些数据来测试基于磁化风模拟的磁层发射模型。他们还将监测各种不同的大规模碰撞风双星，以量化和模拟周期性和非周期性行为。该团队将在南方天文学研究协会(SARA)使用望远镜，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.