Impact simulation in the gravity regime: Exploring the effects of parent body size and internal structure

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Title: Impact simulation in the gravity regime: Exploring the effects of parent body size and internal structure
Authors: Benavídez, Paula Gabriela | Durda, Daniel D. | Enke, Brian | Campo Bagatin, Adriano | Richardson, Derek C. | Asphaug, Erik | Bottke, William F.
Research Group/s: Astronomía y Astrofísica
Center, Department or Service: Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal | Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías
Keywords: Collisional physics | Impact process | Asteroid families
Knowledge Area: Física Aplicada
Issue Date: Apr-2018
Publisher: Elsevier
Citation: Icarus. 2018, 304: 143-161. doi:10.1016/j.icarus.2017.05.030
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.
Sponsor: This work was partly supported by the Spanish Ministerio de Ciencia e Innovacion (now expired) grant AYA2011-30106-C02-02.
ISSN: 0019-1035 (Print) | 1090-2643 (Online)
DOI: 10.1016/j.icarus.2017.05.030
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2017 Elsevier Inc.
Peer Review: si
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Appears in Collections:INV - Astronomía y Astrofísica - Artículos de Revistas

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