Fig. 9. Kinetic temperature as a function of distance to Sgr B2M as derived from and predicted by models. The thick solid line represents the averaged kinetic gas temperature obtained from our maps. In all cases was obtained by considering gas-dust coupling as the main heating mechanism. The last case also includes the dissipation of turbulent motions. The luminosity of the infrarred sources is . For Scoville & Kwan model see Scoville & Kwan (1976)