From Hot Jupiters to Hot Neptunes … and Below(Origins : From Early Universe to Extrasolar Planets)

概要

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Since the discovery of the first Hot Jupiter around 51 Pegasi in 1995, the field of exoplanet detection has been driven by the improvements in the precision of radial velocity measurements. Reaching accuracies lower than 10m s^<-1> on Doppler measurements has allowed to explore the domain of gas giants like Jupiter and Saturn. Now, the domain of 1m s^<-1> accuracy has been reached, opening the realm of Neptune-mass planets and lower. In parallel, the transit method has come of age, with six detections in the past two years. Transiting planets offer a direct view into planet structure and composition. Planetary size, density, and even the composition of their atmosphere can be measured during the transit. Several elements have already been detected in the transiting planet HD209458, which seems to be slowly evaporating. In the coming few years, the combination of space-based transit surveys and dedicated radial-velocity spectrograph will open the domain of terrestrial exoplanets.
理論物理学刊行会の論文
2005-07-30