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Kusakabe, N. Takato, N. Zimmerman, O. Guyon, R. Kandori, R. Suzuki, S. Egner, S. Hayashi, S. Miyama, S. Sorahana, T. Brandt, T. Currie, T. Henning, T. Kotani, T. Kudo, T. Matsuo, T. Nakagawa, T. Nishimura, T.-S. Pyo, T. Suenaga, T. Usuda, T. Yamada, W. Brandner, Y. Hayano, Y. Takahashi","submitted_at":"2013-10-15T20:00:05Z","abstract_excerpt":"Most exoplanets detected by direct imaging so far have been characterized by relatively hot (> ~1000 K) and cloudy atmospheres. A surprising feature in some of their atmospheres has been a distinct lack of methane, possibly implying non-equilibrium chemistry. Recently, we reported the discovery of a planetary companion to the Sun-like star GJ 504 using Subaru/HiCIAO within the SEEDS survey. 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