凌星类热木行星大气的地面观测研究

Ground-based Observational Characterization of Transiting Hot-Jupiter Atmosphere

太阳系外凌星类行星是目前进行系外行星大气研究的最佳目标之一．在特殊的轨道构型条件下才可以进行凌星主食和次食的观测，它们分别对应于行星位于宿主恒星正前方和背后两种情况．相应的观测可以产生大气透射谱和热发射谱，在大气组成和温度结构的观测研究中扮演着重要的角色．

Transiting exoplanets are currently among the most favorable targets for atmospheric studies of exoplanets. Such special orbital geometry enables transits and secondary eclipses to be observable, which refer to the events when planets move in front of or behind host stars. Corresponding observations would result in transmission spectroscopy or emission spectroscopy, which are extremely powerful in the investigation of atmospheric compositions and temperature structures. Based on these two techniques, this thesis presents photometric observations on the secondary eclipses of three hot Jupiters using GROND （Gamma-Ray Burst Optical and Near-infrared Detector） mounted on the MPG 2.2 m telescope, and spec- troscopic observations on the transits of another two hot Jupiters using DBSP （Double Spectrograph）, TSpec （Triple Spectrograph）, and COSMIC （Carnegie Observatories Spectroscopic Multislit and Imaging Camera） mounted on the Palomar 5.1 Hale telescope. The primary goal is to search for any detectable signals of atmospheric origin, and to study potential atmospheric diversity among hot Jupiters with various physical properties.