Benavídez, Paula Gabriela, Durda, Daniel D., Enke, Brian, Campo Bagatin, Adriano, Richardson, Derek C., Asphaug, Erik, Bottke, William F.
Impact simulation in the gravity regime: Exploring the effects of parent body size and internal structure
Icarus. 2018, 304: 143-161. doi:10.1016/j.icarus.2017.05.030
URI: http://hdl.handle.net/10045/73994
DOI: 10.1016/j.icarus.2017.05.030
ISSN: 0019-1035 (Print)
Abstract: 
In this work we extend the systematic investigation of impact outcomes of 100-km-diameter targets started by Durda et al. (2007) and Benavidez et al. (2012) to targets of D = 400 km using the same range of impact conditions and two internal structures: monolithic and rubble-pile. We performed a new set of simulations in the gravity regime for targets of 400 km in diameter using these same internal structures. This provides a large set of 600 simulations performed in a systematic way that permits a thorough analysis of the impact outcomes and evaluation of the main features of the size frequency distribution due mostly to self-gravity. In addition, we use the impact outcomes to attempt to constrain the impact conditions of the asteroid belt where known asteroid families with a large expected parent body were formed. We have found fairly good matches for the Eunomia and Hygiea families. In addition, we identified a potential acceptable match to the Vesta family from a monolithic parent body of 468 km. The impact conditions of the best matches suggest that these families were formed in a dynamically excited belt. The results also suggest that the parent body of the Eunomia family could be a monolithic body of 382 km diameter, while the one for Hygiea could have a rubble-pile internal structure of 416 km diameter.
Keywords:Collisional physics, Impact process, Asteroid families
Elsevier
info:eu-repo/semantics/article