230 citations · 552 across the 23 of their papers we have counts for
24 papers
Where planetary solids survive sublimation around young and hot white dwarfs
Dimitri Veras, Keiji Ohtsuki, Rafael Martinez-Brunner +2
All observed planetary systems orbiting single white dwarfs have lived through the hot stellar transition from an asymptotic giant branch star. In this post-nebular transition peri…
Color and Size Distributions of Small Jupiter Trojans
Fumi Yoshida, Tsuyoshi Terai, Keiji Ohtsuki
We conducted a two-band imaging survey observation using the Subaru Telescope and its wide-field camera, Suprime-Cam, to study the visible colors and size distribution of Jupiter's…
Rings around giant planets and smaller bodies
Keiji Ohtsuki
All the four giant planets in our Solar System have rings, but their characteristics are very different. The rings consist of a number of small particles, although individual parti…
Discovery and dynamics of a Sedna-like object with a perihelion of 66 au
Ying-Tung Chen, Patryk Sofia Lykawka, Yukun Huang +30
Trans-Neptunian objects (TNOs) with large perihelion distances ( au) and semi-major axes ( au) provide insights into the early evolution of the solar system and th…
Delivery of Dust Particles from Protoplanetary Disks onto Circumplanetary Disks of Giant Planets
Natsuho Maeda, Keiji Ohtsuki, Ryo Suetsugu +3
Principal regular satellites of gas giants are thought to be formed by the accumulation of solid materials in circumplanetary disks (CPDs). While there has been significant progres…
Delivery of gas onto the circumplanetary disk of giant planets: Planetary-mass dependence of the source region of accreting gas and mass accretion rate
Natsuho Maeda, Keiji Ohtsuki, Takayuki Tanigawa +2
Gas accretion onto the circumplanetary disks and the source region of accreting gas are important to reveal dust accretion that leads to satellite formation around giant planets. W…
A global system of furrows on Ganymede indicative of their creation in a single impact event
Naoyuki Hirata, Ryo Suetsugu, Keiji Ohtsuki
Furrows are a concentric system of tectonic troughs, and are the oldest recognizable surface feature on Ganymede. We analyzed the distribution of furrows utilizing Voyager and Gali…
Disruption of Saturn's ring particles by thermal stress
Naoyuki Hirata, Ryuji Morishima, Keiji Ohtsuki +1
Spacecraft and ground-based observations show that the main rings of Saturn lack particles larger than 10 m. Tidal or collisional destruction of satellites/comets have been propose…
Dust release from cold ring particles as a mechanism of spoke formation in Saturn's rings
Naoyuki Hirata, Hiroshi Kimura, Keiji Ohtsukia
Spokes in Saturn's rings are radially-extended structures consisting of dust grains. Although spacecraft and space telescope observations have revealed various detailed features of…
Electrostatic Dust Ejection From Asteroid (3200) Phaethon With the Aid of Mobile Alkali Ions at Perihelion
Hiroshi Kimura, Katsuhito Ohtsuka, Shota Kikuchi +12
The asteroid (3200) Phaethon is known to be the parent body of the Geminids, although meteor showers are commonly associated with the activity of periodic comets. What is most pecu…
Size Distribution of Small Jupiter Trojans in the L5 Swarm
Kotomi Uehata, Tsuyoshi Terai, Keiji Ohtsuki +1
We present an analysis of survey observations of the trailing L5 Jupiter Trojan swarm using the wide-field Hyper Suprime-Cam CCD camera on the 8.2 m Subaru Telescope. We detected 1…
Size distributions of bluish and reddish small main-belt asteroids obtained by Subaru/Hyper Suprime-Cam
Natsuho Maeda, Tsuyoshi Terai, Keiji Ohtsuki +3
We performed a wide-field survey observation of small asteroids using the Hyper Suprime-Cam installed on the 8.2 m Subaru Telescope. We detected more than 3,000 main-belt asteroids…
FOSSIL: I. The Spin Rate Limit of Jupiter Trojans
Chan-Kao Chang, Ying-Tung Chen, Wesley C. Fraser +25
Rotation periods of 53 small (diameters km) Jupiter Trojans (JTs) were derived using the high-cadence light curves obtained by the FOSSIL phase I survey, a Subaru/Hype…
Colors of Centaurs observed by the Subaru/Hyper Suprime-Cam and implications for their origin
Haruka Sakugawa, Tsuyoshi Terai, Keiji Ohtsuki +4
Centaurs have orbits between Jupiter and Neptune and are thought to originate from the trans-Neptunian region. Observations of surface properties of Centaurs and comparison with th…
Multi-band Photometry of Trans-Neptunian Objects in the Subaru Hyper Suprime-Cam Survey
Tsuyoshi Terai, Fumi Yoshida, Keiji Ohtsuki +7
We present a visible multi-band photometry of trans-Neptunian objects (TNOs) observed by the Subaru Telescope in the framework of Hyper Suprime-Cam Subaru Strategic Program (HSC-SS…
Distribution of captured planetesimals in circumplanetary gas disks and implications for accretion of regular satellites
Ryo Suetsugu, Keiji Ohtsuki
Regular satellites of giant planets are formed by accretion of solid bodies in circumplanetary disks. Planetesimals that are moving on heliocentric orbits and are sufficiently larg…
Ring Formation around Giant Planets by Tidal Disruption of a Single Passing Large Kuiper Belt Object
Ryuki Hyodo, Sébastien Charnoz, Keiji Ohtsuki +1
The origin of rings around giant planets remains elusive. Saturn's rings are massive and made of 90-95% of water ice. In contrast, the much less massive rings of Uranus and Neptune…
Formation of Centaurs' rings through their partial tidal disruption during planetary encounters
Ryuki Hyodo, Sébastien Charnoz, Hidenori Genda +1
Centaurs are minor planets orbiting between Jupiter and Neptune that have or had crossing orbits with one or more giant planets. Recent observations and reinterpretation of previou…
Capture of planetesimals by waning circumplanetary gas disks
Ryo Suetsugu, Keiji Ohtsuki
When gas giant protoplanets grow sufficiently massive, circumplanetary disks would form. While solid bodies captured by the circumplanetary disks likely contribute to the growth of…
Orbital characteristics of planetesimals captured by circumplanetary gas disks
Ryo Suetsugu, Keiji Ohtsuki, Tetsuya Fujita
Sufficiently massive growing giant planets have circumplanetary disks, and the capture of solid bodies by the disks would likely influence the growth of the planets and formation o…
Formation of Multiple-Satellite Systems From Low-Mass Circumplanetary Particle Disks
Ryuki Hyodo, Keiji Ohtsuki, Takaaki Takeda
Circumplanetary particle disks would be created in the late stage of planetary formation either by impacts of planetary bodies or disruption of satellites or passing bodies, and sa…
A multilayer model for thermal infrared emission of Saturn's rings. III: Thermal inertia inferred from Cassini CIRS
Ryuji Morishima, Linda Spilker, Keiji Ohtsuki
The thermal inertia values of Saturn's main rings (the A, B, and C rings and the Cassini division) are derived by applying our thermal model to azimuthally scanned spectra taken by…
Distribution of Accreting Gas and Angular Momentum onto Circumplanetary Disks
Takayuki Tanigawa, Keiji Ohtsuki, Masahiro N. Machida
We investigate gas accretion flow onto a circumplanetary disk from a protoplanetary disk in detail by using high-resolution three-dimensional nested-grid hydrodynamic simulations,…
Accretion Rates of Planetesimals by Protoplanets Embedded in Nebular Gas
Takayuki Tanigawa, Keiji Ohtsuki
When protoplanets growing by accretion of planetesimals have atmospheres, small planetesimals approaching the protoplanets lose their energy by gas drag from the atmospheres, which…