Abstract

The spatial distribution of warm dust and emission in the Unidentified Infra-red Bands (UIBs) around RCW 106 have been studied using mid-infrared (MIR) measurements. Details of the interstellar medium in this region have been obtained from a self-consistent radiative transfer modeling (in spherical geometry) of observed Spectral Energy Distribution (SED). Using these best fit parameters, the luminosity in infrared features due to Polycyclic Aromatic Hydrocarbon (PAH) has been estimated using a simulation based on Cloudy. The predicted luminosity of PAH bands matches reasonably well (within a factor of two) with that inferred from MSX as well as direct observations from Spitzer-IRS.