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Gas accretion onto the circumplanetary disks and the source region ofaccreting gas are important to reveal dust accretion that leads to satelliteformation around giant planets. We performed local three-dimensionalhigh-resolution hydrodynamic simulations of isothermal and inviscid gas flowaround a planet to investigate planetary-mass dependence of gas accretion bandwidth and gas accretion rate onto circumplanetary disks. We examined cases withvarious planetary masses corresponding to M_p=0.05-1M_{Jup} at 5.2 au, whereM_{Jup} is the current Jovian mass. We found that the radial width of the gasaccretion band is proportional to M_p^{1/6} for the low-mass regime with M_p <0.2 M_{Jup} while it is proportional to M_p for the high-mass regime with M_p >0.2M_{Jup}. We found that the ratio of the mass accretion rate onto thecircumplanetary disk to that into the Hill sphere is about 0.4 regardless ofplanetary mass for the cases we examined. Combining our results with the gapmodel obtained from global hydrodynamic simulations, we derive semi-analyticalformulae of mass accretion rate onto circumplanetary disks. We found that themass dependence of our three-dimensional accretion rates is the same as thepreviously-obtained two-dimensional case, although the qualitative behavior ofaccretion flow onto the CPD is quite different between the two cases.

astrophysical journal/the astrophysical journal

Delivery of gas onto the circumplanetary disk of giant planets:  Planetary-mass dependence of the source region of accreting gas and mass  accretion rate