Gas flow structure and azimuthally averaged mass flux. The results were obtained from m02 − hw0 (panels a and b), m02 − hw01 (panels c and d), and m04 − hw0 (panels e and f). Left column: gas flow structure at the meridian plane. The color contour represents the r-component of the gas velocity in the spherical polar coordinates centered at the planet and averaged in the y-direction within the calculation domain of the hydrodynamical simulation. The dashed, dotted, and dashed-dotted circles denote the Bondi radius, the Hill radius, and twice the atmospheric radius, respectively. Right column: mass flux of the gas averaged in the azimuthal direction in the spherical polar coordinates centered at the planet, 〈ρ_gυ_r〉_ϕ. Each solid line represents the changes in 〈ρ_gυ_r〉_ϕ; altitude is varied along with a certain radius. We highlight the important radii with solid yellow (R_Bondi), blue (R_Hill), and red (2 R_atm) lines.