TITLE:
Gas-Dust Protoplanetary Disc: Modeling Collisional Interaction of Primordial Bodies
AUTHORS:
M. Ya. Marov, A. V. Rusol
KEYWORDS:
Planetary System, Origin, Evolution, Protoplanetary Disc, Fluffy Cluster, Permeable Particles, Numerical Modeling, Collision, Icy-Stone Body
JOURNAL NAME:
Journal of Modern Physics,
Vol.6 No.3,
February
25,
2015
ABSTRACT: One of
the key problems in the concept of planetary systems origin and early evolution
is solid bodies formation in the protoplanetary gas-dust disc around young
stars. Dust particles interactions inside the original fluffy dust clusters of
fractal nature resulted from gravitational instability and fragmentation in the
disc’s central plane areassumed as the most plausible mechanism of primary
bodies set up owing to particles integration within the clusters. Follow
upcollisions are regarded to be responsible for eventual growth of primary
bodies to the size of planetesimals. We discuss this scenario including
chemical nature of particles depending on the disc’s radial temperature distribution
and phase transitions. The mathematical model is developed based on the method
of penetrating particles with the account for internal structure/properties of
bodies involved, complicated patterns of their interaction, and
phenomenological approach to describe energy distribution in the contact zone.
The model is mainly addressed to the stage of formed solid bodies collisions.
The results of numerical evaluation of the model are described involving some
constraints for complete or partial destruction of colliding bodies followed by
either scattering of collisional fragments orpartial back accumulation.