Program: GS-2008A-C-5

It is very important to investigate the properties and spatial distribution of dust in debris disks to discuss the planet formation process. We have found 9 new debris disk candidates that show large 18 micron excess from the AKARI/IRC mid-infrared all-sky survey data. Here we propose mid-infrared follow-up observations with high spatial resolution to reveal detailed spatial distribution and properties of the dust in the debris disks candidates with Subaru/COMICS and Gemini/T-ReCS. Our proposed observations are (1) mid-infrared multicolor imaging at 10-25 micron region and (2) 10 micron spectroscopy. By the imaging observations, we investigate dust temparetures and spatial distributions of dust disk from the obtained mid-infrared spectral energy distributions and spatially resolved thermal emission from the disks. By the spectroscopic observations, we also investigate dust properties, which may provide us some hints about the origin of dust in debris disks.