TY - JOUR
T1 - New Versus Past Silica Crush Curve Experiments
T2 - Application to Dimorphos Benchmarking Impact Simulations
AU - Malamud, Uri
AU - Schäfer, Christoph M.
AU - Luciana San Sebastián, Irina
AU - Timpe, Maximilian
AU - Alexander Essink, Karl
AU - Kreuzig, Christopher
AU - Meier, Gerwin
AU - Blum, Jürgen
AU - Perets, Hagai B.
AU - Burger, Christoph
N1 - Publisher Copyright: © 2024. The Author(s). Published by the American Astronomical Society.
PY - 2024/10/1
Y1 - 2024/10/1
N2 - Crush curves are of fundamental importance to numerical modeling of small and porous astrophysical bodies. The empirical literature often measures them for silica grains, and different studies have used various methods, sizes, textures, and pressure conditions. Here, we review past studies and supplement further experiments in order to develop a full and overarching understanding of the silica crush curve behavior. We suggest a new power-law function that can be used in impact simulations of analog materials similar to microgranular silica. We perform a benchmarking study to compare this new crush curve to the parametric quadratic crush curve often used in other studies, based on the study case of the DART impact onto the asteroid Dimorphos. We find that the typical quadratic crush curve parameters do not closely follow the silica crushing experiments, and as a consequence, they under (over) estimate compression close (far) from the impact site. The new crush curve presented here, applicable to pressures between a few hundred Pa and up to 1.1 GPa, might therefore be more precise. Additionally, it is not calibrated by case-specific parameters, and can be used universally for comet- or asteroid-like bodies, given an assumed composition similar to microgranular silica.
AB - Crush curves are of fundamental importance to numerical modeling of small and porous astrophysical bodies. The empirical literature often measures them for silica grains, and different studies have used various methods, sizes, textures, and pressure conditions. Here, we review past studies and supplement further experiments in order to develop a full and overarching understanding of the silica crush curve behavior. We suggest a new power-law function that can be used in impact simulations of analog materials similar to microgranular silica. We perform a benchmarking study to compare this new crush curve to the parametric quadratic crush curve often used in other studies, based on the study case of the DART impact onto the asteroid Dimorphos. We find that the typical quadratic crush curve parameters do not closely follow the silica crushing experiments, and as a consequence, they under (over) estimate compression close (far) from the impact site. The new crush curve presented here, applicable to pressures between a few hundred Pa and up to 1.1 GPa, might therefore be more precise. Additionally, it is not calibrated by case-specific parameters, and can be used universally for comet- or asteroid-like bodies, given an assumed composition similar to microgranular silica.
UR - http://www.scopus.com/inward/record.url?scp=85206647072&partnerID=8YFLogxK
U2 - https://doi.org/10.3847/1538-4357/ad6c4a
DO - https://doi.org/10.3847/1538-4357/ad6c4a
M3 - مقالة
SN - 0004-637X
VL - 974
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 76
ER -