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The Galilean Satellites Formed Slowly from Pebbles
Yuhito Shibaike, Chris W. Ormel, Shigeru Ida +2
It is generally accepted that the four major (Galilean) satellites formed out of the gas disk that accompanied Jupiter's formation. However, understanding the specifics of the form…
Formation of rocky and icy planetesimals inside and outside the snow line: Effects of diffusion, sublimation and back-reaction
Ryuki Hyodo, Shigeru Ida, Sébastien Charnoz
It is important to clarify where and when rocky and icy planetesimals are formed in a viscously evolving disk. We wish to understand how local runaway pile-up of solids occurs insi…
Effects of a Binary Companion Star on Habitability of Tidally Locked Planets around an M-type Host Star
Ayaka Okuya, Yuka Fujii, Shigeru Ida
Planets in the "Habitable Zones" around M-type stars are important targets for characterization in future observations. Due to tidal-locking in synchronous spin-orbit rotations, th…
Discovery of an au-scale excess in millimeter emission from the protoplanetary disk around TW Hya
Takashi Tsukagoshi, Takayuki Muto, Hideko Nomura +10
We report the detection of an excess in dust continuum emission at 233~GHz (1.3~mm in wavelength) in the protoplanetary disk around TW~Hya revealed through high-sensitivity observa…
Speeding past planets? Asteroids radiatively propelled by giant branch Yarkovsky effects
Dimitri Veras, Arika Higuchi, Shigeru Ida
Understanding the fate of planetary systems through white dwarfs which accrete debris crucially relies on tracing the orbital and physical properties of exo-asteroids during the gi…
Gas flow around a planet embedded in a protoplanetary disc: the dependence on the planetary mass
Ayumu Kuwahara, Hiroyuki Kurokawa, Shigeru Ida
The three-dimensional structure of the gas flow around a planet is thought to influence the accretion of both gas and solid materials. In particular, the outflow in the mid-plane r…