31 citations · 335 across the 31 of their papers we have counts for
28 papers · 1 filter
Oxygen Isotopic Compositions of Chondrules as Probes of Solar Protoplanetary Disk Formation
Sota Arakawa, Takayuki Ushikubo, Ryosuke T. Tominaga
Chondrules are thought to have formed during transient flash-heating events in dust-enriched regions of the solar protoplanetary disk. Although laboratory studies have characterize…
Oxygen Isotope Exchange Between Dust Aggregates and Ambient Nebular Gas
Sota Arakawa, Daiki Yamamoto, Lily Ishizaki +2
Meteorites and their components exhibit a diverse range of oxygen isotope compositions, and the isotopic exchange timescale between dust grains and ambient gas is a key parameter f…
Chondrule Destruction via Dust Collisions in Shock Waves
Yuji Matsumoto, Kosuke Kurosawa, Sota Arakawa
A leading candidate for the heating source of chondrules and igneous rims is shock waves. This mechanism generates high relative velocities between chondrules and dust particles. W…
Survivability of Amorphous Ice in Comets Depends on the Latent Heat of Crystallization of Impure Water Ice
Sota Arakawa, Shigeru Wakita
Comets would have amorphous ice rather than crystalline one at the epoch of their accretion. Cometary ice contains some impurities that govern the latent heat of ice crystallizatio…
Oxygen Isotope Exchange Between Molten Silicate Spherules and Ambient Water Vapor with Nonzero Relative Velocity: Implication for Chondrule Formation Environment
Sota Arakawa, Daiki Yamamoto, Takayuki Ushikubo +4
Oxygen isotope compositions of chondrules reflect the environment of chondrule formation and its spatial and temporal variations. Here, we present a theoretical model of oxygen iso…
Size Dependence of the Bouncing Barrier in Protoplanetary Dust Growth
Sota Arakawa, Satoshi Okuzumi, Misako Tatsuuma +5
Understanding the collisional behavior of dust aggregates is essential in the context of planet formation. It is known that low-velocity collisions of dust aggregates result in bou…
Interpebble contact radius in a comet nucleus
Sota Arakawa, Daisuke Nishiura, Mikito Furuichi
In recent years, the gravitational collapse of pebble clumps in the early Solar System has been regarded as a plausible scenario for the origin of comets. In this context, ``pebble…
Igneous Rim Accretion on Chondrules in Low-Velocity Shock Waves
Yuji Matsumoto, Sota Arakawa
Shock wave heating is a leading candidate for the mechanisms of chondrule formation. This mechanism forms chondrules when the shock velocity is in a certain range. If the shock vel…
Threshold velocity for collisional growth of porous dust aggregates consisting of cohesive frictionless spheres
Sota Arakawa, Hidekazu Tanaka, Eiichiro Kokubo +2
Understanding the collisional outcomes of dust aggregates and dependence on material properties of the constituting particles is of great importance toward understanding planet for…
Collisional growth efficiency of dust aggregates and its independence of the strength of interparticle rolling friction
Sota Arakawa, Hidekazu Tanaka, Eiichiro Kokubo
The pairwise collisional growth of dust aggregates consisting submicron-sized grains is the first step of the planet formation, and understanding the collisional behavior of dust a…
Impacts of viscous dissipation on collisional growth and fragmentation of dust aggregates
Sota Arakawa, Hidekazu Tanaka, Eiichiro Kokubo
Understanding the collisional behavior of dust aggregates consisting of submicron-sized grains is essential to unveiling how planetesimals formed in protoplanetary disks. It is kno…
Fine-grained rim formation via kinetic dust aggregation in shock waves around evaporating icy planetesimals
Sota Arakawa, Hiroaki Kaneko, Taishi Nakamoto
Fine-grained rims (FGRs) are frequently found around chondrules in primitive chondrites. The remarkable feature of FGRs is their submicron-sized and non-porous nature. The typical…
Dependence of the initial internal structure of chondrule rim on dust size distribution
Hiroaki Kaneko, Sota Arakawa, Taishi Nakamoto
Coarse objects in chondrites such as chondrules and CAIs are mostly coated with fine-grained rims (FGRs). FGRs can be formed on the surface of free floating chondrules in a turbule…
Tidal evolution of the eccentric moon around dwarf planet (225088) Gonggong
Sota Arakawa, Ryuki Hyodo, Daigo Shoji +1
Recent astronomical observations revealed that (225088) Gonggong, a 1000-km-sized trans-Neptunian dwarf planet, hosts an eccentric satellite, Xiangliu, with an eccentricity of appr…
On the crystallinity of silicate dust in evolving protoplanetary disks due to magnetically driven disk winds
Sota Arakawa, Yuji Matsumoto, Mitsuhiko Honda
We present a novel mechanism for the outward transport of crystalline dust particles: the outward radial drift of pebbles. The dust ring structure is frequently observed in protopl…
On the stickiness of CO and HO ice particles
Sota Arakawa, Sebastiaan Krijt
Laboratory experiments revealed that CO ice particles stick less efficiently than HO ice particles, and there is an order of magnitude difference in the threshold veloc…
Assessment of Cr isotopic heterogeneities of volatile-rich asteroids based on multiple planet formation models
Ryota Fukai, Sota Arakawa
Describing the comprehensive evolutionary scenario for asteroids is key to explaining the various physical processes of the solar system. Bulk-scale carbonaceous chondrites (CCs) p…
Thermal inertias of pebble-pile comet 67P/Churyumov-Gerasimenko
Sota Arakawa, Kazumasa Ohno
The Rosetta mission to comet 67P/Churyumov-Gerasimenko has provided new data to better understand what comets are made of. The weak tensile strength of the cometary surface materia…
Revisiting sticking property of submillimetre-sized aggregates
Sota Arakawa
Understanding the physical properties of dust aggregates is of great importance in planetary science. In this study, we revisited the sticking property of submillimetre-sized aggre…
Photophoresis in the circumjovian disk and its impact on the orbital configuration of the Galilean satellites
Sota Arakawa, Yuhito Shibaike
Jupiter has four large regular satellites called the Galilean satellites: Io, Europa, Ganymede, and Callisto. The inner three of the Galilean satellites orbit in a 4:2:1 mean motio…
Geometrical structure and thermal conductivity of dust aggregates formed via ballistic cluster-cluster aggregation
Sota Arakawa, Masaki Takemoto, Taishi Nakamoto
We herein report a theoretical study of the geometrical structure of porous dust aggregates formed via ballistic cluster-cluster aggregation (BCCA). We calculated the gyration radi…
Early formation of moons around large trans-Neptunian objects via giant impacts
Sota Arakawa, Ryuki Hyodo, Hidenori Genda
Recent studies have revealed that all large (over 1000 km in diameter) trans-Neptunian objects (TNOs) form satellite systems. Although the largest Plutonian satellite, Charon, is t…
Compound chondrule formation in optically thin shock waves
Sota Arakawa, Taishi Nakamoto
Shock-wave heating within the solar nebula is one of the leading candidates for the source of chondrule-forming events. Here, we examine the possibility of compound chondrule forma…
Thermal conductivity and coordination number of compressed dust aggregates
Sota Arakawa, Misako Tatsuuma, Naoya Sakatani +1
Understanding the heat transfer mechanism within dust aggregates is of great importance for many subjects in planetary science. We calculated the coordination number and the therma…