Аннотация:We simulated passing planetesimals through the circumplanetary disks of Jupiter and Saturn
and capture of their material into the disks with consideration of combined processes of aerodynamic
braking, fragmentation, and ablation of planetesimals in the disk’s gas medium. We estimated maximum
planetesimal size which the body should have at the entrance to the disk in order to stay in the disk.
Without regard for fragmentation the bodies with initial radius R<30 m are captured in the circum-Jovian disk at Callisto distance, R<100 m at Ganymede distance and R<12 m at Titan distance. There is a
significant dependence on the ablation coefficients of the amount of material captured by the disk. For
ablation factors <0.01 s2km-2, the contribution of ablation to the captured mass can be ignored, however, for planetesimals from cometary material, ablation can supply 20-30% of the mass of planetesimals in the feeding area of Ganymede and Callisto and 10%-20% in the feeding area of Titan.