YNAO OpenIR  > 系外行星研究组
Alternative TitlePhotometric Observations and Study of the Transiting Exoplanetary System HAT-P-8
谭泓博1,2; 王晓彬1; 顾盛宏1; Andrew Collier Cameron3
Source Publication天文学报(Acta Astronomica Sinica)
Contribution Rank第1完成单位
Indexed ByCSCD ; 核心
Keyword行星与卫星:个别 方法:观测 方法:数据分析

利用云南天文台1 m望远镜以及丽江天文观测站2.4 m望远镜,分别在2009年和2012年对凌食太阳系外行星系统HAT-P-8进行了测光观测.为了提高凌食信号的信噪比,使用coarse de-correlation和SyeRem两种方法对测光数据中的系统误差进行了改正.应用MCMC(Markov Chain Monte Carlo)方法对3组数据进行同时分析求解获得了HAT-P-8系统新的物理参数.得到HAT-P-8b的半径为Rp=1.28 R_J(R_J为木星半径),这比该行星发现时Latham等人给出的数值要小,而与最近Mancini等人所得的结果一致.通过线性拟合23个慎重挑选的凌食中心时刻,得到HAT-P-8b新的轨道周期P=3.0763461±0.0000021 d,并且从(O-G)(观测值减计算值)分析中没有发现显著的TTV(Transit Timing Variation)信号.

Other Abstract

Three transit events of HAT-P-8 are observed by using the 1 m telescope of Yunnan Observatory and 2.4 m telescope of Lijiang Observing Station in 2009 and 2012, respectively. The observational data were reduced with the coarse de-correlation and SysRem algorithms in order to obtain high signal to noise ratio for the transit feature. The MCMC (Markov Chain Monte Carlo) technique is applied to analyze three transit light curves simultaneously, then the new parameters of HAT-P-8 system are derived. The new value of the radius for HAT-P-8b is smaller than the one given by Latham et al., but it is consistent with the value derived by Mancini et al. recently. By linear fitting to the 23 mid-transit times with high precision, the orbital period of HAT-P-8b is refined as P=3.0763461±0.0000021 d. No obvious TTV (Transit Timing Variation) signal can be found from the present (O-C) analysis.

Funding Project中国科学院知识创新工程重要方向项目[KJCX2-YW-T24] ; 国家自然科学基金项目[10873031]
Funding Organization中国科学院知识创新工程重要方向项目[KJCX2-YW-T24] ; 国家自然科学基金项目[10873031]
Subject Area天文学 ; 天体物理学 ; 实测天体物理学 ; 恒星与银河系 ; 恒星天文学
MOST Discipline Catalogue理学 ; 理学::天文学
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Document Type期刊论文
Affiliation1.中国科学院云南天文台, 昆明, 650011
2.中国科学院大学, 北京, 100049
3.School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS, UK
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
谭泓博,王晓彬,顾盛宏,等. 系外行星系统HAT-P-8凌食事件的测光观测研究[J]. 天文学报(Acta Astronomica Sinica),2013,54(6):527-536.
APA 谭泓博,王晓彬,顾盛宏,&Andrew Collier Cameron.(2013).系外行星系统HAT-P-8凌食事件的测光观测研究.天文学报(Acta Astronomica Sinica),54(6),527-536.
MLA 谭泓博,et al."系外行星系统HAT-P-8凌食事件的测光观测研究".天文学报(Acta Astronomica Sinica) 54.6(2013):527-536.
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