KMS of Xinjiang Astronomical Observatory, CAS
| 反银心方向时域巡天的测试巡天研究 | |
| Alternative Title | A Precursive Survey of TheTime-domain Survey of The GalacticAnti-center |
马树国
| |
| Subtype | 硕士 |
| Thesis Advisor | 艾力·伊沙木 |
| 2017 | |
| Degree Grantor | 中国科学院大学 |
| Place of Conferral | 北京 |
| Degree Discipline | 天体物理 |
| Keyword | 反银心方向时域巡天 变源 数据处理 测试 |
| Abstract | 恒星的光变提供了恒星结构及动力学方面的重要物理信息，普查反银心方向的变源，不但可以研究恒星的结构与演化，而且可以帮助我们更好 的理解银河系的结构和演化过程。为了探测反银心方向的变源分布和性质，继LAMOST反银心方向光谱巡天，以及盱眙施密特望远镜反银心方向光度巡天，我们计划开展反银心方向时域巡天研究。在反银心方向时域巡天工作正式开始前，为了制定完善的巡天策略，测试、优化时域巡天的数据处理系统，预估反银心方向时域巡天的产出，我们利用新疆天文台南山观测基地的一米大视场光学望远镜进行了该时域巡天的测试观测以及研究。在本测试研究中，用南山一米光学望远镜，在15.03平方度的天区内，探测到48颗变星，其中有30颗是新发现的变星。这些变星的仪器星等在11-18等之间，最小的光变周期是0.978 小时，探测到的最小变幅是0.029mag。基于这些变星在V波段的光变曲线，结合VSX和GCVS变星星表，对这些变星的类型进行了划分，确定了 28颗食双星，10颗天琴座RR变星，3颗其他类型的周期性脉动变星，以及7颗无法确定类 型的变星。利用时域数据处理系统的相位分析和period04软件结合，得到了其中周期性变源的周期和变幅，并且利用天琴座RR变星的性质得到了10颗RR Lyraes的距离。通过这次测试巡天，优化了数据处理的过程，检测了时域巡天数据处理系统寻找时变源的能力，并且为制定反银心方向时域巡天策略提供了观测依据。 |
| Other Abstract | Light variations provide important physical information for stellar structure and stellar motion. General survey of variable stars in the Galactic Anti-center can help studying the formation and evolution of the stars, and understanding how galaxy as-sembles and acquiring its characteristic structure. In order to obtain the information of variable stars in the Galactic Anti-center, we plan to conduct a time-domain survey of Galactic Anti-center (TDSGAC) following the LAMOST Spectroscopic Survey and the Xuyi imaging survey of Galactic Anti-center. For the sake of assuring TDSGAC to be well afoot, a precursive sky survey (PSS) using the Nanshan 1m telescope at XAO?s Nanshan Station was carried out to optimize observation strategy of TDSGAC and verify availability of time-domain data processing system. The PSS surveyed a discontinuous sky area of 15.03 sq.deg, found 48 variable stars, 30 of which are new¬ly discovered. These variable stars have apparent magnitude ranging from 11 to 18. The shortest period of them is 0.978 hour, and the smallest amplitude is 0.029mag. Combining with VSX cataloge, we classify the type of variable stars, and identify 28 eclipsing binary stars, 10 RR Lyraes, 3 pulsating stars based on the light curve in V band, and 7 variable stars with indeterminate type. Using ofXAO time-domain survey data processing system and Period04, we acquire the period and amplitude of periodic variable stars. We also acquire the distance of RR Lyraes by their intrinsic character¬istics. The PSS verifies the availability of XAO time-domain survey data processing system in search of variable stars. Additionally the PSS provides important reference for the strategy of the TDSGAC. |
| Language | 中文 |
| Document Type | 学位论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/1705 |
| Collection | 研究生学位论文 光学天文与技术应用研究室 |
| Affiliation | 中国科学院新疆天文台 |
| Recommended Citation GB/T 7714 | 马树国. 反银心方向时域巡天的测试巡天研究[D]. 北京. 中国科学院大学,2017. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 2017届硕士学位论文-马树国.pdf（22361KB） | 暂不开放 | CC BY-NC-SA | Application Full Text | |||
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