Doppler Imaging of Surface Features on Rotating Stars

虽然太阳上的黑子已经被观测了近四个世纪，而且它们的行为也有很好的记录，但是研究其他恒星上的类似现象是极其困难的。在这笔拨款的支持下，PI将继续使用多普勒成像技术绘制一些恒星上的黑点。麦克唐纳天文台的新摄谱仪将增加可用数据的数量和质量，并扩展该计划以利用其能力。对几颗恒星的观测已经研究了数年，将继续确定黑子是否在纬度上迁移（就像在太阳上一样）。对更大样本的斑点恒星的观测将用于确定斑点形态对恒星性质的依赖。对Ap星的研究将继续进行，并将增加T - Tau星和W - UMa星的研究。＊＊＊

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. ***