137 citations · 752 across the 31 of their papers we have counts for
16 papers · 1 filter
Formation and disruption of resonant chains of super-Earths: Secular perturbations from outer eccentric embryos
Masahiro Ogihara, Masanobu Kunitomo
Recent observations have revealed the distribution of orbital period ratios of adjacent planets in multiple super-Earth systems and how these distributions change with time. The ai…
Long-term evolution of the temperature structure in magnetized protoplanetary disks and its implication for the dichotomy of planetary composition
Shoji Mori, Masanobu Kunitomo, Masahiro Ogihara
The thermal structure and evolution of protoplanetary disks play a crucial role in planet formation. In addition to stellar irradiation, accretion heating is also thought to signif…
Super-Earth formation with slow migration from a ring in an evolving peaked disk compatible with terrestrial planet formation
Masahiro Ogihara, Alessandro Morbidelli, Masanobu Kunitomo
For the origin of the radially concentrated solar system's terrestrial planets, planet formation from a ring of solids at about 1 au from the Sun with convergent/suppressed type I…
Three-dimensional atmospheric dynamics of Jupiter from ground-based Doppler imaging spectroscopy in the visible
François-Xavier Schmider, Patrick Gaulme, Raúl Morales-Juberías +25
We present three-dimensional (3D) maps of Jupiter's atmospheric circulation at cloud-top level from Doppler-imaging data obtained in the visible domain with JIVE, the second node o…
Evolution of a Water-rich Atmosphere Formed by a Giant Impact on an Earth-sized Planet
Kenji Kurosaki, Yasunori Hori, Masahiro Ogihara +1
The atmosphere of a terrestrial planet that is replenished with secondary gases should have accumulated hydrogen-rich gas from its protoplanetary disk. Although a giant impact blow…
A Close-in Planet Orbiting Giant Star HD 167768
Huan-Yu Teng, Bun'ei Sato, Masanobu Kunitomo +12
We report the detection of a giant planet orbiting a G-type giant star HD 167768 from radial velocity measurements using HIgh Dispersion Echelle Spectrograph (HIDES) at Okayama Ast…
Evolution of the Water Snow Line in Magnetically Accreting Protoplanetary Disks
Shoji Mori, Satoshi Okuzumi, Masanobu Kunitomo +1
The low water content of the terrestrial planets in the solar system suggests that the protoplanets formed within the water snow line. Accurate prediction of the snow line location…
Formation of giant planets with large metal masses and metal fractions via giant impacts in a rapidly dissipating disk
Masahiro Ogihara, Yasunori Hori, Masanobu Kunitomo +1
According to planetary interior models, some giant planets contain large metal masses with large metal-mass fractions. HD 149026b and TOI-849b are characteristic examples of these…
Photoevaporative Dispersal of Protoplanetary Disks around Evolving Intermediate-mass Stars
Masanobu Kunitomo, Shigeru Ida, Taku Takeuchi +3
We aim to understand the effect of stellar evolution on the evolution of protoplanetary disks. We focus in particular on the disk evolution around intermediate-mass (IM) stars, whi…
A compositional link between rocky exoplanets and their host stars
Vardan Adibekyan, Caroline Dorn, Sérgio G. Sousa +17
Stars and planets both form by accreting material from a surrounding disk. Because they grow from the same material, theory predicts that there should be a relationship between the…
The impact of pre-main sequence stellar evolution on midplane snowline locations and C/O in planet forming discs
James M. Miley, Olja Panić, Richard A. Booth +3
We investigate the impact of pre-main sequence stellar luminosity evolution on the thermal and chemical properties of disc midplanes. We create template disc models exemplifying in…
Unified simulations of planetary formation and atmospheric evolution II: Rapid disk clearing by photoevaporation yields low-mass super-Earth atmospheres
Masahiro Ogihara, Masanobu Kunitomo, Yasunori Hori
Super-Earths possess low-mass H/He atmospheres (typically less than 10% by mass). However, the origins of super-Earth atmospheres have not yet been ascertained. We investigate…
Dispersal of protoplanetary disks by the combination of magnetically driven and photoevaporative winds
Masanobu Kunitomo, Takeru K. Suzuki, Shu-ichiro Inutsuka
We investigate the roles of magnetically driven disk wind (MDW) and thermally driven photoevaporative wind (PEW) in the long-time evolution of protoplanetary disks. We start simula…
First sub-arcsecond submillimeter-wave [C I] image of 49 Ceti with ALMA
Aya E. Higuchi, Kazuya Saigo, Hiroshi Kobayashi +7
We present the first sub-arcsecond images of 49 Ceti in the [C I]3P1-3P0 emission and the 614 micron dust continuum emission observed with ALMA, as well as that in the CO(J=3-2) em…
Hot Grain Dynamics by Electric Charging and Magnetic Trapping in Debris Disks
Hiroshi Kimura, Masanobu Kunitomo, Takeru K. Suzuki +3
The recent discovery of hot dust grains in the vicinity of main-sequence stars has become a hot issue among the scientific community of debris disks. Hot grains must have been enor…
Planet Engulfment by ~1.5-3 Solar-Mass Red Giants
M. Kunitomo, M. Ikoma, B. Sato +2
Recent radial-velocity surveys for GK clump giants have revealed that planets also exist around ~1.5-3 Msun stars. However, no planets have been found inside 0.6 AU around clump gi…