Doppler Imaging of Surface Features on Rotating Stars

9315115哈兹尽管太阳上的黑子已经被观察了近四个世纪，它们的行为也被很好地记录下来，但在其他恒星上研究类似的现象是极其困难的。在这笔赠款的支持下，PI将继续使用被称为多普勒成像的技术来绘制一些恒星上的斑点。麦克唐纳天文台的新光谱仪将提高可用数据的数量和质量，该计划将得到扩展，以利用其能力。对已研究多年的几颗恒星的观测将继续确定黑子是否在纬度上迁移(如在太阳上)。对更大样本的斑点恒星的观察将被用来确定黑子形态对恒星性质的依赖性。对AP明星的研究将继续进行，而T Tau明星和W Uma明星将加入该计划。***

9315115 Hatzes Although spots on the sun have been observed for nearly four centuries and their behavior is well documented, it is extremely difficult to study similar phenomena on other stars. With support from this grant the PI will continue to map the spots on a number of stars using the technique known as Doppler imaging. A new spectrograph at McDonald Observatory will increase both the quantity and quality of the data available and the program be extended to take advantage of its capabilities. Observations of several stars which have been studied for a number of years will continue to determine whether spots migrate in latitude (as in the sun). Observations of a larger sample of spotted stars will be used to determine the dependence of spot morphology on the properties of the stars. Studies of Ap stars will be continued while T Tau stars and W UMa stars will be added to the program. ***