Azimuthally averaged mass and surface density derived from the ¹³CO (top) and C¹⁸O (bottom) column density maps. From left to right: each column shows (i) radially integratedmass, (ii) radially integrated mass divided by the area of the circle with radius R_cir (i.e., radially integrated surface density), (iii) concentric annular mass, (iv) concentric annular surface density. The radially integrated mass and surface density were calculated within circles of radius R_cir centered on IRS 1 from R = 25″ (~ 0.1 pc) to R = 600″ (~ 2.4 pc). The concentric annular mass and surface density were calculated within concentric rings of radius R_ring =R_cir,out − R_cir,in = 36″ (corresponding to the Herschel beam size). In order to do a direct comparison of the profiles, the x-axis in the concentric annular mass and surface density profiles correspond to R_cir,out. The yellow dotted lines indicate the different slopes in the surface density profiles. The light gray zone indicates the transition between the hub and the filaments, from 200′′ to 300′′. The dark gray area marks the central hub with R_hub = 250” = 1 pc.