Periodic Phenomena in Cataclysmic Binaries

灾难性双星中的周期性现象

• 批准号: 0098254
• 负责人: Joseph Patterson
• 金额: $ 20.71万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-07-01 至 2005-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0098254&HistoricalAwards=false
• 关键词: Periodic; Phenomena; Cataclysmic; Binaries

"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.

“灾难性双星中的周期性现象”AST-0098254小型望远镜是变星光度测量的首选仪器，其本质上需要覆盖长时间基础的天气观测。主要天文台基本上不具备此类设施，并且越来越多的业余观测者使用小型望远镜进行此类工作。许多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) 成熟的软件，易于使用。另一方面，主要的天文台正变得更加专业化，只有配备昂贵仪器的大型望远镜才能提供稀缺且大部分共享的时间。 PI 组建了一个全球小型光度测量望远镜网络，为灾变变星提供光度测量。了解这些恒星需要测量这些双星的轨道周期以及它们出现时的周期变化。当计划使用大型望远镜进行光谱观测时，最新的星历表至关重要。在该奖项的过程中，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缩减和评估。此外，他将领导研究结果的分析和发布。