317 citations · 1k across the 20 of their papers we have counts for
21 papers
Subsurface pulse, crater and ejecta asymmetry from oblique impacts into granular media
Bingcheng Suo, A. C. Quillen, Max Neiderbach +9
We carry out experiments of 104 m/s velocity oblique impacts into a granular medium (sand). Impact craters have nearly round rims even at a grazing angle of about , howev…
Froude number scaling unifies impact trajectories into granular media across gravitational conditions
Peter M. Miklavcic, Ethan Tokar, Esteban Wright +4
The interactions of solid objects with granular media is countered by a resistance force that stems from frictional forces between the grains and the media's resistance to inertia…
Effects of reduced gravity on the granular fluid-solid transition: underexplored forces can dominate soft matter behaviors
Paul Sánchez, Karen E. Daniels, Heinrich Jaeger +1
Granular media are soft matter systems that exhibit some of the extreme behavior of complex fluids. Understanding of the natural formation of planetary bodies, landing on and explo…
Ejecta from the DART-produced active asteroid Dimorphos
Jian-Yang Li, Masatoshi Hirabayashi, Tony L. Farnham +61
Some active asteroids have been proposed to be the result of impact events. Because active asteroids are generally discovered serendipitously only after their tail formation, the p…
After DART: Using the first full-scale test of a kinetic impactor to inform a future planetary defense mission
Thomas S. Statler, Sabina D. Raducan, Olivier S. Barnouin +38
NASA's Double Asteroid Redirection Test (DART) is the first full-scale test of an asteroid deflection technology. Results from the hypervelocity kinetic impact and Earth-based obse…
Transmission of a Seismic Wave generated by impacts on Granular Asteroids
Paul Sánchez, Daniel J. Scheeres, Alice C. Quillen
In this paper we use a Soft-Sphere Discrete Element method code to simulate the transmission and study the attenuation of a seismic wave. Then, we apply our findings to the differe…
Predictions for the Dynamical States of the Didymos System before and after the Planned DART Impact
Derek C. Richardson, Harrison F. Agrusa, Brent Barbee +33
NASA's Double Asteroid Redirection Test (DART) spacecraft is planned to impact the natural satellite of (65803) Didymos, Dimorphos, around 23:14 UTC on 26 September 2022, causing a…
Surface particle motions excited by a low velocity normal impact into a granular medium
Max Neiderbach, Bingcheng Suo, Esteban Wright +5
In laboratory experiments, high speed videos are used to detect and track mm-size surface particle motions caused by a low velocity normal impact into sand. Outside the final crate…
Sub-surface granular dynamics in the context of oblique, low-velocity impacts into angular granular media
Peter M. Miklavčič, Hesam Askari, Paul Sánchez +2
Oblique, low-velocity impacts onto extraterrestrial terrain are an inevitable occurrence during space exploration. We conduct two-dimensional discrete simulations to model such imp…
Propagation and attenuation of pulses driven by low velocity normal impacts in granular media
A. C. Quillen, Max Neiderbach, Bingcheng Suo +7
We carry out experiments of low velocity normal impacts into granular materials that fill an approximately cylindrical 42 litre tub. Motions in the granular medium are tracked with…
Ricochets on Asteroids II: Sensitivity of laboratory experiments of low velocity grazing impacts on substrate grain size
Esteban Wright, Alice C. Quillen, Paul Sanchez +4
We compare low velocity impacts that ricochet with the same impact velocity and impact angle into granular media with similar bulk density, porosity and friction coefficient but di…
Cohesive Regolith on Fast Rotating Asteroids
Paul Sánchez, Daniel J. Scheeres
The migration of cohesive regolith on the surface of an otherwise monolithic or strong asteroid is studied using theoretical and simulation models. The theory and simulations show…
Small Solar System Bodies as granular media
D. Hestroffer, P. Sánchez, L. Staron +12
Asteroids and other Small Solar System Bodies (SSSBs) are of high general and scientific interest in many aspects. The origin, formation, and evolution of our Solar System (and oth…
Simulations of wobble damping in viscoelastic rotators
Alice C. Quillen, Katelyn J. Wagner, Paul Sanchez
Using a damped mass-spring model, we simulate wobble of spinning homogeneous viscoelastic ellipsoids undergoing non-principal axis rotation. Energy damping rates are measured for o…
Boulder Stranding in Ejecta Launched by an Impact Generated Seismic Pulse
Esteban Wright, Alice C. Quillen, Juliana South +6
We consider how an impact generated seismic pulse affects the surface of an asteroid distant from the impact site. With laboratory experiments on dry polydisperse gravel mixtures,…
Impact Excitation of a Seismic Pulse and Vibrational Normal Modes on Asteroid Bennu and Associated Slumping of Regolith
Alice C. Quillen, Yuhui Zhao, YuanYuan Chen +3
We consider an impact on an asteroid that is energetic enough to cause resurfacing by seismic reverberation and just below the catastrophic disruption threshold, assuming that seis…
Asteroid Evolution: Role of Geotechnical Properties
Paul Sánchez
This paper presents a brief review and latest results of the work that has been carried out by the Planetary Science community in order to understand that role of the geotechnical…
Internal Structure of Asteroids Having Surface Shedding due to Rotational Instability
Masatoshi Hirabayashi, Diego Paul S'anchez, Daniel J. Scheeres
Surface shedding of an asteroid is a failure mode where surface materials fly off due to strong centrifugal forces beyond the critical spin period, while the internal structure doe…
Asteroid Surface Geophysics
Naomi Murdoch, Paul Sanchez, Stephen R. Schwartz +1
The regolith-covered surfaces of asteroids preserve records of geophysical processes that have occurred both at their surfaces and sometimes also in their interiors. As a result of…
The Strength of Regolith and Rubble Pile Asteroids
Paul Sanchez, Daniel J. Scheeres
We explore the hypothesis that, due to small van der Waals forces between constituent grains, small rubble pile asteroids have a small but non-zero cohesive strength. The nature of…
Scaling forces to asteroid surfaces: The role of cohesion
D. J. Scheeres, C. M. Hartzell, P. Sanchez +1
The scaling of physical forces to the extremely low ambient gravitational acceleration regimes found on the surfaces of small asteroids is performed. Resulting from this, it is fou…