The dayside hemispheres of ultra-hot Jupiters are not just extremely hot, they also possess strong temperature inversion layers — an analog of Earth’s stratosphere. We observed the dayside of several ultra-hot Jupiters using high-resolution thermal emission spectroscopy. Here are the summaries: Here is a poster on detailed discoveries: References:
In order to detect exoplanet transmission spectrum in high spectral resolution, it is necessary to model the stellar line profile change during transit. The stellar line profile change is mostly due to two effects: Rossiter-McLaughlin (RM) effect and the Centre-to-Limb Variation (CLV) effect. The RM effect is due to the Read more…
Transit spectroscopy is one of the most commonly used techniques for exoplanet atmosphere characterisation. The centre-to-limb variation (CLV) of the stellar lines across the stellar disk is an important effect for transmission spectroscopy, since it results in a change of stellar line depth when the planet transits different parts of Read more…
A lunar eclipse is actually the Earth transiting the Sun when viewed from the moon. Thus we can obtained the Earth’s transmission spectrum by observing lunar eclipses. During my PhD study, I observed three lunar eclipses with different instruments and configurations. These observations yield three interesting results: (1) The high Read more…
Giant exoplanets orbiting close to their host stars have high temperatures because they receive immense stellar irradiation. The extreme energy input leads to the expansion of the atmosphere and the escape of neutral hydrogen. KELT-9b is the hottest exoplanet known so far. It is particularly interesting to study its atmosphere Read more…