Deformation and splitting of asteroids by YORP spin-up

Details Deformation and splitting of asteroids by YORP spin-up Deformation and splitting of asteroids by YORP spin-up

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..420c&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.420

Computer Science

Scientific paper

We explore the dynamics of rotating gravitational aggregates by a gravitational N-body code based on hard spheres. In particular, we address the problem of satellite formation due to fission of a parent asteroid. Our simulations show that significant asymmetries can be produced in the asteroid shapes during a YORP spinup process, eventually leading to fission into two or more components. In some cases the creation of a bound binary system is observed. In contrast to previous models we are able to simulate the direct binary formation, without passing through intermediate steps of mass shedding and reaccumulation. Also, we investigate a higher rotation regime, under the hypothesis that asteroids can sustain a certain stress due to a nonnegligible internal cohesion. Different possible evolutions are presented, creating a broad spectrum of cases to compare with the real data.

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