系外行星系统HAT-P-8凌食事件的测光观测研究
发布时间：2018-09-17 17:16
【摘要】：太阳系外行星系统参数的观测研究对理解行星系统的形成和演化有着不可或缺的重要性；同时也为人类理解太阳系的形成和演化提供了更多可比较和借鉴的样本。 对凌食系外行星的凌食事件进行测光观测是获得行星系统参数的一种重要方法。通过分析凌食事件的光变曲线，能够求解出行星的半径和轨道倾角等重要系统参数，加上视向速度法得到的质量函数M sini，还能够计算行星的质量。而由行星的半径及质量决定的密度是理解行星形成的重要数据。此外，通过对已知凌食太阳系外行星系统进行长期后续观测，还可以探测其TTV(Transit Timing Variation)和TDV(Transit Duration Variation)信号以用于探索系统中是否有其它未被发现的行星。 本论文的主要工作是利用云南天文台现有的1m望远镜(昆明)及2.4m望远镜(丽江)，，[粝低庑行窍低矵AT-P-8进行凌食事件的高精度测光观测和参数研究。使用Collier Cameron的coarse de-correlation和Tamuz的SYSREM两种方法对测光数据中的系统误差进行改正，得到了高信噪比的凌食光变曲线。进一步的，通过应用MCMC(Markov Chain Monte Carlo)方法分析凌食光变曲线，获得行星系统参数，并探寻系统中是否存在TTV信号。
[Abstract]:The observational study of the parameters of extrasolar planetary system is indispensable to understand the formation and evolution of planetary system, and it also provides more comparable and referential samples for human understanding of the formation and evolution of the solar system. It is an important method to obtain planetary system parameters by photometric observation of the transgression events of exoplanets. By analyzing the light variation curve of the transit event, the important system parameters, such as the radius of the planet and the inclination angle of the orbit, can be solved, and the mass function M sini, obtained by the apparent velocity method can also be used to calculate the mass of the planet. The density determined by the radius and mass of the planet is an important data for understanding the formation of planets. In addition, the TTV (Transit Timing Variation) and TDV (Transit Duration Variation) signals can be detected by long-term follow-up observations of the known exoplanet system, which can be used to find out if there are other undiscovered planets in the system. The main work of this paper is to use the existing 1m telescope (Kunming) and 2.4 m telescope (Lijiang) of Yunnan Observatory. The high precision photometric observation and parameter study of the feeding event were carried out by AT-P-8. The system error of photometry data is corrected by Collier Cameron coarse de-correlation and Tamuz SYSREM, and the high SNR optical transit curve is obtained. Furthermore, the planetary system parameters are obtained by using the MCMC (Markov Chain Monte Carlo) method to analyze the light variation curve of the system and to find out whether there is a TTV signal in the system.
【学位授予单位】：中国科学院研究生院（云南天文台）
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P125
本文编号：2246587
[Abstract]:The observational study of the parameters of extrasolar planetary system is indispensable to understand the formation and evolution of planetary system, and it also provides more comparable and referential samples for human understanding of the formation and evolution of the solar system. It is an important method to obtain planetary system parameters by photometric observation of the transgression events of exoplanets. By analyzing the light variation curve of the transit event, the important system parameters, such as the radius of the planet and the inclination angle of the orbit, can be solved, and the mass function M sini, obtained by the apparent velocity method can also be used to calculate the mass of the planet. The density determined by the radius and mass of the planet is an important data for understanding the formation of planets. In addition, the TTV (Transit Timing Variation) and TDV (Transit Duration Variation) signals can be detected by long-term follow-up observations of the known exoplanet system, which can be used to find out if there are other undiscovered planets in the system. The main work of this paper is to use the existing 1m telescope (Kunming) and 2.4 m telescope (Lijiang) of Yunnan Observatory. The high precision photometric observation and parameter study of the feeding event were carried out by AT-P-8. The system error of photometry data is corrected by Collier Cameron coarse de-correlation and Tamuz SYSREM, and the high SNR optical transit curve is obtained. Furthermore, the planetary system parameters are obtained by using the MCMC (Markov Chain Monte Carlo) method to analyze the light variation curve of the system and to find out whether there is a TTV signal in the system.
【学位授予单位】：中国科学院研究生院（云南天文台）
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P125
【参考文献】
相关期刊论文 前1条
1 刘玉娟,赵刚;太阳系外恒星行星系统的探测与研究进展[J];天文学进展;2005年03期
本文编号：2246587
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