Comparing Results of SPH/N-body Impact Simulations Using Both Solid and Rubble-pile Target Asteroids

Details Comparing Results of SPH/N-body Impact Simulations Using Both Solid and Rubble-pile Target Asteroids Comparing Results of SPH/N-body Impact Simulations Using Both Solid and Rubble-pile Target Asteroids

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.5307d&link_type=abstract

American Astronomical Society, DPS meeting #38, #53.07; Bulletin of the American Astronomical Society, Vol. 38, p.582

Astronomy and Astrophysics

Astronomy

Scientific paper

We have been investigating the properties of satellites and the morphology of size-frequency distributions (SFDs) resulting from a suite of 160 SPH/N-body simulations of impacts into 100-km diameter parent asteroids (Durda et al. 2004, Icarus 170, 243-257; Durda et al. 2006, Icarus, in press). These simulations have produced many valuable insights into the outcomes of cratering and disruptive impacts but were limited to monolithic basalt targets. As a natural consequence of collisional evolution, however, many asteroids have undergone a series of battering impacts that likely have left their interiors substantially fractured, if not completely rubblized. In light of this, we have re-mapped the matrix of simulations using rubble-pile target objects.
We constructed the rubble-pile targets by filling the interior of the 100-km diameter spherical shell (the target envelope) with randomly sized solid spheres in mutual contact. We then assigned full damage (which reduces tensile and shear stresses to zero) to SPH particles in the contacts between the components; the remaining volume is void space. The internal spherical components have a power-law distribution of sizes simulating fragments of a pre-shattered parent object.
First-look analysis of the rubble-pile results indicate some general similarities to the simulations with the monolithic targets (e.g., similar trends in the number of small, gravitationally bound satellite systems as a function of impact conditions) and some significant differences (e.g., size of largest remnants and smaller debris affecting size frequency distributions of resulting families). We will report details of a more thorough analysis and the implications for collisional models of the main asteroid belt.
This work is supported by the National Science Foundation, grant number AST0407045.

Affiliated with

Also associated with

No associations

Rating

Comparing Results of SPH/N-body Impact Simulations Using Both Solid and Rubble-pile Target Asteroids does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Comparing Results of SPH/N-body Impact Simulations Using Both Solid and Rubble-pile Target Asteroids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comparing Results of SPH/N-body Impact Simulations Using Both Solid and Rubble-pile Target Asteroids will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1001215