| Pulsation and Long-Term Variability of the High-Ampfitude δ Scuti Star AD Canis Minoris |
| |
| 作者姓名： | Pongsak Kholkhuntod Jian-Ning Fu Chayan Boonyarak Kanokwan Marak Li Chen Shi-Yang Jiang |
| |
| 作者单位： | [1]Faculty of Science, Naresuan University, Phitsanulok 65000, Thailand [2]Department of Astronomy, Beijing Normal University, Beijing 100875 [3]National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 |
| |
| 基金项目： | Suppotled by the National Natural Science Foundation of China. Acknowledgements JNF acknowledges the support from the National Natural Science Foundation of China （NSFC）, through Grants 10543001, 10673001, and 10778601, and the Grant 107021 from Beijing Normal University. CL thanks the support of the Grant 20060027013 from the Specialized Research Fund for the Doctoral Program of Higher Education. |
| |
| 摘 要： | Time-series photometry was made for the large-amplitude δ Scuff star AD CMi in 2005 and 2006. High-quality photometric data provided in the literature were used to analyze the pulsation of the star, with the derived multiple frequencies fitted to our new data. Besides the dominant frequency and its harmonics, one low frequency （2.27402 c d^-1） is discovered, which provides a reasonable interpretation for the long-noticed luminosity variation at the maximum and minimum light. Combining the nine new times of light maxima determined from the new data with the 64 times collected from the literature, we analyzed the long-term variability of AD CMi with the O - C technique. The results provide the updated value of period of 0.122974478 days, and seem to be in favor of the model of combination of the evolutionary effect and light-time effect of a binary system, of which some parameters are hereby deduced.
|
| 关 键 词： | 发光星系 可变性 技术性 恒星构成 |
| 修稿时间： | 2006-07-20 |
| 本文献已被 维普 等数据库收录！ |
|
