Periodic Phenomena in Cataclysmic Binaries

"激变双星中的周期现象" AST-0098254小型望远镜是变星星星测光的首选仪器，因为变星测光的性质要求对长时间进行天气观测。这些设施在主要的天文台基本上是不可用的，越来越多的业余观测者正在用小型望远镜进行这种性质的工作。若干因素加速了这一趋势。(1)更便宜的望远镜。(2)更便宜的二维探测器。(3)现成的先进软件。另一方面，主要的天文台变得越来越专业化，只有稀缺的，大多数是共享的时间可以在大型望远镜上使用昂贵的仪器。PI已经建立了一个全球性的小型测光望远镜网络，为激变变星提供测光。了解这些恒星需要测量这些双星的轨道周期沿着发生的周期变化。在计划用大型望远镜进行分光观测时，最新的星历表是必不可少的。在这个奖项的过程中，PI将监督一个由研究生和本科生组成的团队，他们将对全球业余网络提供的数据进行简化和评估。此外，他将领导分析和公布的结果，因为他们成为可用。

"Periodic Phenomena in Cataclysmic Binaries"AST- 0098254Small telescopes are the instrument of choice for variable star photometry which, by its nature, requires synoptic observations covering long time bases. Such facilities are largely unavailable at major observatories and increasingly, amateur observers are doing work of this nature with small telescopes. A number of factors have accelerated this trend. (1) Cheaper telescopes. (2) Cheaper two-dimensional detectors. (3) Sophisticated software that is readily available. On the other hand, the major observatories are becoming more specialized with only scarce, and mostly shared time being available on large telescopes with expensive instrumentation. The PI has assembled a worldwide network of small photometry telescopes to provide the photometry for cataclysmic variable stars. Understanding these stars requires measuring the orbital periods of these binary stars along with period changes when they occur. Up-to-date ephemerides are essential when spectroscopic observation with large telescopes are being planned. During the course of this award, the PI will supervise a team of graduate and undergraduate students who will carry out the reductions and evaluations of the data provided by the worldwide amateur network. In addition, he will lead the analysis and publication of the results as they become available.