We present a comparative study of CO and polycyclic aromatic hydrocarbon (PAH) emission toward a region including the massive star-forming regions of NGC 6334 and NGC 6357. We use the NANTEN 12CO(J=1{0) data and the AKARI 9 m All-Sky diffuse map in order to evaluate the calibration accuracy of the AKARI data. We conrm that the overall CO distribution shows a good spatial correspondence with the PAH emission, and their intensities exhibit a good power-law correlation with a spatial resolution down to 4′ over the region of 10◦10◦. We also reveal poorer correlation for small scale structures between the two quantities toward NGC 6357, due to strong UV radiation from local sources. Larger scatter in the correlation toward NGC 6357 indicates higher ionization degree and/or PAH excitation than that of NGC 6334.

ABSTRACT
1. INTRODUCTION
2. DATASETS
    2.1. CO
    2.2. PAH
3. REGION SELECTION
4. RESULTS AND DISCUSSION
5. SUMMARY
REFERENCES

• Hidetoshi Sano(Department of Physics, Nagoya University)
• Tomoya Amatsutsu(Department of Physics, Nagoya University)
• Toru Kondo(Department of Physics, Nagoya University)
• Keichiro Nakamichi(Department of Physics, Nagoya University)
• Mitsuyoshi Yamagishi(Department of Physics, Nagoya University)
• Daisuke Ishihara(Department of Physics, Nagoya University)
• Shinki Oyabu(Department of Physics, Nagoya University)
• Hidehiro Kaneda(Department of Physics, Nagoya University)
• Kengo Tachihara(Department of Physics, Nagoya University)
• Yasuo Fukui(Department of Physics, Nagoya University)