[P-AE20] 系外惑星

[PAE20-09] 太陽系外惑星の直接撮像・分光による惑星大気の詳細研究について

★招待講演

*小谷 隆行¹、河原 創²、Nugroho Stevanus⁴、石塚 将人³、平野 照幸⁵ (1.自然科学研究機構アストロバイオロジーセンター、2.東京大学大学院理学系研究科地球惑星科学専攻、3.東京大学大学院理学系研究科天文学専攻、4.東北大学大学院天文学専攻、5.東京工業大学理学院 )

キーワード：太陽系外惑星、直接撮像分光

Recent technological advances in the adaptive optics and the spectroscopy in astronomy opened a new window to study atmospheres of extra-solar planets in details. Until recently, precise characterization of exoplanet atmosphere was very difficult due to severely contaminated stellar light, which is usually 1000 times brighter than a planet light. The progress of adaptive optics, a real-time correction system of atmospheric turbulence, will enable us to significantly reduce the stellar contamination to the planet spectrum. Furthermore, high spectral resolution instruments, such as a newly commissioned near-infrared spectrometer at the Subaru telescope, Infrared Doppler (IRD) will allow us, not only to directly detect various molecules like methan, water, TiO, etc. in planet atmospheres, but also to study planet kinematics, i.e. rotation, radial velocity, etc., a key to understand an origin and formation mechanism of Jupiter-like planets. We will present the current status of our project by combining the adaptive optics and high-spectral resolution spectrometer. This project will lead to ultimately detect and characterize Earth-like planet and biomarkers in their atmospheres.