2D accretion rate, Ṁ_2D, (left verticalaxis) and probability (right vertical axis) as a function of the Stokes number in UP (dotted lines), PI-Stokes (solid lines),and PI-Epstein cases (dashed lines). Left column: compares the results between UP and PI-Stokes cases. Right column: compares the results between UP and PI-Epstein cases. The masses of the planet from top to bottom rows: m = 0.003, 0.01, and 0.03, respectively. Colors indicate the Mach number of the headwind of the gas: (red), (yellow), and (blue). The open and filled squares and circles denote the regimes of pebble accretion and the planet-induced gas flow at the given parameters.