The dynamics of boulders, possibly ejected by the DART impact, in the Didymos binary system is investigated by means of the LICEI code. Large particles (boulders) can remain in the Didymos-Dimorphos system for long period of time, but the probability is low. Late reimpacts are present in the simulation. They can produce dust that creates observed tail. Escaping objects may have low initial velocity. Late escapes are also possible. Stability of orbits is affected by the Solar gravity. There is increase in number of escapes and reimpacts when Didymos is close to the Sun. Orbits are very chaotic, very small change in initial condition can dramatically change the fate of a particle. This work is supported by the Italian Space Agency (ASI) within the Hera agreement (ASI-UNIBO, n. 2022-8-HH.0)
Long term modelling of boulders dynamics around the Didymos-Dimorphos system
Krzysztof Langner;Alessandro Rossi;Francesco Marzari
2023
Abstract
The dynamics of boulders, possibly ejected by the DART impact, in the Didymos binary system is investigated by means of the LICEI code. Large particles (boulders) can remain in the Didymos-Dimorphos system for long period of time, but the probability is low. Late reimpacts are present in the simulation. They can produce dust that creates observed tail. Escaping objects may have low initial velocity. Late escapes are also possible. Stability of orbits is affected by the Solar gravity. There is increase in number of escapes and reimpacts when Didymos is close to the Sun. Orbits are very chaotic, very small change in initial condition can dramatically change the fate of a particle. This work is supported by the Italian Space Agency (ASI) within the Hera agreement (ASI-UNIBO, n. 2022-8-HH.0)I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
