| Abstract |
The emission from dust grains usually peaks in the infrared. Observations in the infrared is a powerful tool to investigate the physical properties and conditions of dust grains. Polycyclic Aromatic Hydrocarbons (PAHs) are aromatic carbonaceous nano-particles. They are excited by absorbing a single UV-photon and radiate the absorbed energy as strong infrared band emissions. The relative strength of these band emissions changes with the excitation, ionization, and chemical structure of PAHs. Investigating PAHs gives us a good tool to diagnose radiation environments. In this presentation, we introduce the latest results of the mid-infrared imaging and spectroscopy observations with the Subaru/COMICS, and discuss what can be investigated based on ground-based observations. |
