Shigeru Wakita
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View article: Southward impact excavated magma ocean at the lunar South Pole–Aitken basin
Southward impact excavated magma ocean at the lunar South Pole–Aitken basin Open
View article: Evidence for an Early Formation of Serenitatis Basin at 4.25 Ga Shifts Lunar Chronology
Evidence for an Early Formation of Serenitatis Basin at 4.25 Ga Shifts Lunar Chronology Open
Troctolite sample 76535, collected in Serenitatis basin during Apollo 17, formed at least 50 km deep, experienced maximum shock pressures of 6 GPa, and has a 40 Ar/ 39 Ar excavation age of 4.25 Ga. Previous work attributed 76535 to the Sou…
View article: Impacts Into Titan's Methane‐Clathrate Crust as a Source of Atmospheric Methane
Impacts Into Titan's Methane‐Clathrate Crust as a Source of Atmospheric Methane Open
Titan is the only icy satellite in the solar system with a dense atmosphere. This atmosphere is composed primarily of nitrogen with a few percent methane, which supports an active, methane‐based hydrological cycle on Titan. The presence of…
View article: Normal incidence impacts by hollow projectiles produce vertical plumes: Application to planetary exploration missions
Normal incidence impacts by hollow projectiles produce vertical plumes: Application to planetary exploration missions Open
View article: Early generation of a refractory inclusions-enriched H-chondritic parent body: A safe harbor for Ca, Al-rich inclusions
Early generation of a refractory inclusions-enriched H-chondritic parent body: A safe harbor for Ca, Al-rich inclusions Open
View article: Multiring basin formation constrains Europa’s ice shell thickness
Multiring basin formation constrains Europa’s ice shell thickness Open
Jupiter’s moon Europa hosts a subsurface ocean under an ice shell of uncertain thickness. Europa has two multiring basins that exhibit several concentric rings. The formation of these multiring basins is thought to be sensitive to the thic…
View article: Chondrule Survivability in the Solar Nebula
Chondrule Survivability in the Solar Nebula Open
The lifetime of millimeter-sized dust grains, such as chondrules, in the nominal solar nebula model is limited to ∼10 5 yr, due to an inward drift driven by gas drag. However, isotopic and petrological studies of primitive meteorites indic…
View article: Evolution of Impact Melt Pools on Titan
Evolution of Impact Melt Pools on Titan Open
Titan is an ocean world with a dense atmosphere, where photochemistry produces complex organic molecules that fall to the surface. An important astrobiological question is whether this material can mix with water and form molecules of biol…
View article: Chondrule survivability in the solar nebula
Chondrule survivability in the solar nebula Open
The lifetime of mm size dust grains, such as chondrules, in the nominal solar nebula model is limited to $\sim 10^{5}$ yr due to an inward drift driven by gas drag. However, isotopic and petrological studies on primitive meteorites indicat…
View article: Survivability of Amorphous Ice in Comets Depends on the Latent Heat of Crystallization of Impure Water Ice
Survivability of Amorphous Ice in Comets Depends on the Latent Heat of Crystallization of Impure Water Ice Open
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 crystallization, $L_{\rm cry}$. However, it is still controversial whethe…
View article: Evolution of impact melt pools on Titan - data files
Evolution of impact melt pools on Titan - data files Open
Data files to produce figures in the manuscript entitled 'Evolution of impact melt pools on Titan' written by Klara Kalousova, Shigeru Wakita, Christophe Sotin, Catherine D. Neish, Jason M. Soderblom, Ondrej Soucek, and Brandon C. Johnson …
View article: Evolution of impact melt pools on Titan - data files
Evolution of impact melt pools on Titan - data files Open
Data files to produce figures in the manuscript entitled 'Evolution of impact melt pools on Titan' written by Klara Kalousova, Shigeru Wakita, Christophe Sotin, Catherine D. Neish, Jason M. Soderblom, Ondrej Soucek, and Brandon C. Johnson …
View article: Modeling the Formation of Selk Impact Crater on Titan: Implications for Dragonfly
Modeling the Formation of Selk Impact Crater on Titan: Implications for Dragonfly Open
Selk crater is an ∼80 km diameter impact crater on the Saturnian icy satellite Titan. Melt pools associated with impact craters like Selk provide environments where liquid water and organics can mix and produce biomolecules like amino acid…
View article: Modeling the formation of Selk impact crater on Titan: Implications for Dragonfly
Modeling the formation of Selk impact crater on Titan: Implications for Dragonfly Open
Selk crater is an $\sim$ 80 km diameter impact crater on the Saturnian icy satellite, Titan. Melt pools associated with impact craters like Selk provide environments where liquid water and organics can mix and produce biomolecules like ami…
View article: Replication Data for: Multiring basin formation constrains Europa’s ice shell thickness
Replication Data for: Multiring basin formation constrains Europa’s ice shell thickness Open
This dataset contains input and output files of iSALE-2D for the paper "Multiring basin formation constrains Europa’s ice shell thickness" by S. Wakita et al.
View article: Replication Data for: Modeling the formation of Selk impact crater on Titan: Implications for Dragonfly
Replication Data for: Modeling the formation of Selk impact crater on Titan: Implications for Dragonfly Open
This dataset contains input and output files of iSALE-2D for the paper "Modeling the formation of Selk impact crater on Titan: Implications for Dragonfly" by S. Wakita et al.
View article: Replication Data for: Methane-saturated Layers Limit the Observability of Impact Craters on Titan
Replication Data for: Methane-saturated Layers Limit the Observability of Impact Craters on Titan Open
This dataset contains input and output files of iSALE-2D for the paper "Methane-saturated Layers Limit the Observability of Impact Craters on Titan" S. Wakita et al. (2022) Planet. Sci. J. 3 50. Each tgz file contains input (*.inp) and o…
View article: Formation and evolution of carbonaceous asteroid Ryugu: Direct evidence from returned samples
Formation and evolution of carbonaceous asteroid Ryugu: Direct evidence from returned samples Open
Samples of the carbonaceous asteroid Ryugu were brought to Earth by the Hayabusa2 spacecraft. We analyzed 17 Ryugu samples measuring 1 to 8 millimeters. Carbon dioxide–bearing water inclusions are present within a pyrrhotite crystal, indic…
View article: Effect of impact velocity and angle on deformational heating and post-impact temperature
Effect of impact velocity and angle on deformational heating and post-impact temperature Open
The record of impact induced shock-heating in meteorites is an important key for understanding the collisional history of the solar system. Material strength is important for impact heating, but the effect of impact angle and impact veloci…
View article: Dataset of "Effect of impact velocity and angle on deformational heating and post-impact temperature"
Dataset of "Effect of impact velocity and angle on deformational heating and post-impact temperature" Open
This dataset contains input files for iSALE-3D and Data Set for the paper "Effect of impact velocity and angle on deformational heating and post-impact temperature" by S. Wakita et al. Please note that usage of the iSALE-3D code is restri…
View article: Dataset of "Effect of impact velocity and angle on deformational heating and post-impact temperature"
Dataset of "Effect of impact velocity and angle on deformational heating and post-impact temperature" Open
This dataset contains input files for iSALE-3D and Data Set for the paper "Effect of impact velocity and angle on deformational heating and post-impact temperature" by S. Wakita et al. Please note that usage of the iSALE-3D code is restri…
View article: Effect of Impact Velocity and Angle on Deformational Heating and Postimpact Temperature
Effect of Impact Velocity and Angle on Deformational Heating and Postimpact Temperature Open
The record of impact‐induced shock heating in meteorites is an important key for understanding the collisional history of the solar system. Material strength is important for impact heating, but the effect of impact angle and impact veloci…
View article: Methane-saturated Layers Limit the Observability of Impact Craters on Titan
Methane-saturated Layers Limit the Observability of Impact Craters on Titan Open
As the only icy satellite with a thick atmosphere and liquids on its surface, Titan represents a unique end-member to study the impact cratering process. Unlike craters on other Saturnian satellites, Titan’s craters are preferentially loca…
View article: Impactor material records the ancient lunar magnetic field in antipodal anomalies
Impactor material records the ancient lunar magnetic field in antipodal anomalies Open
The Moon presently has no dynamo, but magnetic fields have been detected over numerous portions of its crust. Most of these regions are located antipodal to large basins, leading to the hypothesis that lunar rock ejected during basin-formi…
View article: Dataset of "Impactor material records the ancient lunar magnetic field in antipodal anomalies"
Dataset of "Impactor material records the ancient lunar magnetic field in antipodal anomalies" Open
This dataset contains input files for iSALE-3D for the paper "Impactor material records the ancient lunar magnetic field in antipodal anomalies" by S. Wakita et al. Please note that usage of the iSALE-3D code is restricted to those who ha…
View article: Dataset of "Impactor material records the ancient lunar magnetic field in antipodal anomalies"
Dataset of "Impactor material records the ancient lunar magnetic field in antipodal anomalies" Open
This dataset contains input files for iSALE-3D for the paper "Impactor material records the ancient lunar magnetic field in antipodal anomalies" by S. Wakita et al. Please note that usage of the iSALE-3D code is restricted to those who ha…
View article: Dataset of "Electron holography details the Tagish Lake parent body and implies early planetary dynamics of the Solar System"
Dataset of "Electron holography details the Tagish Lake parent body and implies early planetary dynamics of the Solar System" Open
Input files for iSALE-2D of the paper "Electron holography details the Tagish Lake parent body and implies early planetary dynamics of the Solar System" by Y. Kimura et al. Please note that usage of the iSALE-2D is not fully open source; …
View article: Dataset of "Electron holography details the Tagish Lake parent body and implies early planetary dynamics of the Solar System"
Dataset of "Electron holography details the Tagish Lake parent body and implies early planetary dynamics of the Solar System" Open
Input files for iSALE-2D of the paper "Electron holography details the Tagish Lake parent body and implies early planetary dynamics of the Solar System" by Y. Kimura et al. Please note that usage of the iSALE-2D is not fully open source; …
View article: Jetting during oblique impacts of spherical impactors
Jetting during oblique impacts of spherical impactors Open
View article: Aggregate Growth and Internal Structures of Chondrite Parent Bodies Forming from Dense Clumps
Aggregate Growth and Internal Structures of Chondrite Parent Bodies Forming from Dense Clumps Open
The major components of chondrites are chondrules and matrix. Measurements of volatile abundance in Semarkona chondrules suggest that chondrules formed in a dense clump that had a higher solid density than the gas density in the solar nebu…