| 相接食双星GR Boo极小时刻的分析研究 |
| |
| 引用本文： | 皮青峰,张立云,程长青. 相接食双星GR Boo极小时刻的分析研究[J]. 贵州大学学报(自然科学版), 2013, 0(6): 35-38 |
| |
| 作者姓名： | 皮青峰 张立云 程长青 |
| |
| 作者单位： | [1]贵州大学理学院,贵州贵阳550025 [2]国家天文台-贵州大学天文联合研究中心,贵州贵阳550025 |
| |
| 基金项目： | 国家自然科学基金项目资助（10978010,11263001）;贵州大学教育教学改革研究项目资助（JG2013083） |
| |
| 摘 要： | 食双星是国际上比较热点的研究课题之一。为分析研究相接食双星GRBoo极小时刻的周期变化,本文收集整理了迄今为止食双星GR Boo所有的极小时刻,并对GRBoo的极小时刻（HJDmin）和周期（EPOCH）进行了线性拟合得到相应的一次历元公式,再通过该历元公式计算得到了其对应的残差（O-C）。通过对GRBoo极小时刻的线性拟合残差与周期的分析,首次发现GRBoo的周期是减少的,其对应的周期变化（减少）率为（-2．3±0．2）×10^-7天每年,最后分析讨论GRBoo周期变化的物理机制。
|
| 关 键 词： | 相接食双星 极小时刻 周期变化 历元公式 物理机制 |
Analysis of the Contact Eclipsing Binary GR Boo Minimum Times |
| |
| PI Qing-feng,ZHANG Li-yun,CHENG Chang-qing. Analysis of the Contact Eclipsing Binary GR Boo Minimum Times[J]. Journal of Guizhou University(Natural Science), 2013, 0(6): 35-38 |
| |
| Authors: | PI Qing-feng ZHANG Li-yun CHENG Chang-qing |
| |
| Affiliation: | 1. College of Science, Guizhou University, Guiyang 550025, China; 2. Joint Researeh Centre for Astronomy National Astronomical Observatory of Guizhou University, Guiyang 550025, China) |
| |
| Abstract: | Eclipsing binary is one of the hot research topics in the world. To calculate an update ephemeris and the change of orbital period of contact binary GR Boo, all published light minimum times were collected from the literatures. Using the least-squares method, a new linear ephemeris formula was obtained. Based on our new ephemeris, the residual （O-C） values are also calculated. By analyzed the O-C values with period, we firstly found the period decrease of GR Boo at a rate of （-2.3±0.2）×10^-7 days/year. In the end, the physical mechanisms （ mass transfer or magnetic braking） of period decrease of GR Boo were discussed. |
| |
| Keywords: | contact eclipsing binary minimum times periodic variation epoch formula physical mechanisms |
| 本文献已被 维普 等数据库收录！ |
|
