YNAO OpenIR  > 系外行星研究组
Alternative TitlePhotometric Follow-up observations and study for the transiting exoplanetary system HAT-P-8
Thesis Advisor王晓彬
Degree Grantor中国科学院研究生院(云南天文台)
Place of Conferral北京
Degree Discipline天体物理
Keyword系外行星 Hat-p-8b 凌食 测光观测 系统参数
Abstract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Msin{i},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),対太阳系外行星系统HAT-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。
Other AbstractThe physical parameters of alien solar systems are very important for understanding the formation and evolution of planetary systems, Even for our solar system by providing more comparable and referenced samples of planetary systems. The photometric observations of transiting events of exoplanets is one of the most important ways to derive the planetary parameters. From the transiting light curves of exoplanets, the radius of an exoplanet and the orbtial inclination can be inferred. Combining with radial velocity data, the mass also can be derived. The density of exoplanet derived from the size and mass of exoplanet is the key data for understanding its formation and evolution. Furtherly, the transit timing variation(TTV) and transit duration variation(TDV) of an exoplanet can be used to dectect other undiscovered exoplanets in the planetary system. Photometric follow-up observations for transiting exoplanetary system HAT-P-8 were made by using 1m telescope in Kunming and 2.4m telescope in Lijiang of Yunnan Observatory. The observational data were reduced by IRAF software, and systematic errors were corrected with the Collier Cameron's coarse de-correlation and Tamuz' SYSREM algorithms in order to obtain high ratio of signal to noise of the transit feature. The MCMC(Markov Chain Monte Carlo) technique was applied to analyze all transit light curves simultaneously, and the new parameters of HAT-P-8 system were derived. Also the TTV signals of this system were analysed.
Subject Area天文学
Document Type学位论文
Recommended Citation
GB/T 7714
谭泓博. 系外行星系统HAT-P-8凌食事件的测光观测研究[D]. 北京. 中国科学院研究生院(云南天文台),2013.
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