Mass Transfer Modulations in Interacting Binary Stars

物质从一颗星星到另一颗恒星的转移 “相互作用的双星”星星系统似乎以一种高度 不均匀的步伐。 这些系统的演化敏感地依赖于 对平均传质速率的影响。因此，澄清 这些调制的性质对于理解 这些系统的起源和命运。 校长 研究者（PI）在过去得到了NSF的支持， 并使印第安纳州大学的16英寸望远镜自动化， 更精确地测量星星亮度（光度测量）， 比过去更有效率。 PI现在计划使用这个 设备以及美国海军天文台的40英寸望远镜 在亚利桑那州的弗拉格斯塔夫进行协调观测， 可获得三年来晴朗夜晚的恒星样本， 三类相互作用的双星：激变双星，矮双星 新星和大陵五双星 要研究的过程发生在 在几天到几年的时间尺度上。 该研究包括以下测试 新星演化的“冬眠理论”， “超极大值”与其他特征的关系 矮新星的光变曲线，以及寻找 大陵五星系。

The transfer of material from one star to another in close "interacting binary" star systems appears to proceed at a highly uneven pace. The evolution of these systems depends sensitively on the average mass transfer rate. Therefore a clarification of the nature of these modulations is important to an understanding of both the origin and fate of these systems. The Principal Investigator (PI) has received NSF support in the past to modernize and automate the 16-inch telescope at Indiana University to conduct measures of star brightnesses (photometry) more accurately and efficiently than in the past. The PI now plans to use this equipment as well as a 40-inch telescope at U.S. Naval Observatory in Flagstaff, Arizona to conduct coordinated observations every available clear night for three years of a sample of stars from three classes of interacting binaries: cataclysmic binaries, dwarf novae, and "Algol" binaries. The processes to be studied occur over timescales of days to years. The research includes tests of the "hibernation theory" of nova evolution, the determination of the relationship of the "supermaxima" to other features in the light curves of dwarf novae, and the search for activity cycles in Algol systems.