JpGU-AGU Joint Meeting 2020

Presentation information

[J] Oral

P (Space and Planetary Sciences ) » P-PS Planetary Sciences

[P-PS09] Planetary Sciences

convener:Yusuke Nakauchi(Japan Aerospace Exploration Agency), Yuko Daket(University of Aizu)

[PPS09-23] Cratering erosion: revisited

*Ryuki Hyodo1, Hidenori Genda2 (1.JAXA/ISAS, 2.ELSI)

Keywords:Cratering erosion, Impact, Planet formation

Numerous impacts of small bodies inevitably occur on larger planetary bodies. These impacts erode mass from target depending on impact velocities and impact angles. Holsapple & Housen (2007) provided the planetary community a scaling law that predicts the mass of cratring erosion under the point-source assumption. The scaling law is widely used in variety of studies of planetary impact phenomenon. In this work, by performing the state-of-the-art direct numerical simulations, we found that the point-source scaling law overestimates the erosion mass by a factor of several to order of magnitude by overstepping the range of a point-source assumption. Using data obtained from numerical simulations, we derive a new scaling law of the erosion mass from target that covers both within and beyond the limitation of the point-source assumption (Hyodo&Genda 2020 in prep).