With AKARI, we carried out near-infrared spectroscopy of the nearby barred spiral galaxy, NGC 1097, categorized as Seyfert 1 with a circumnuclear starburst ring. Our observations mapped the galactic center region. As a result, we obtain the spatial distributions of the polycyclic aromatic hydrocarbon 3.3μm and the aliphatic hydrocarbon 3.4−3.6 μm emission. The former is detected from all the observed regions and the latter is enhanced near the bar connecting the ring with the nucleus. In addition, we detect absorption features due to H2O ice and CO/SiO at the ring and the galactic center, while we detect the hydrogen recombination line Brα only from the ring. Hence the observed spectra change dramatically within the central 1 kpc region.

ABSTRACT
1. INTRODUCTION
2. RESULT AND DISCUSSION
REFERENCES

• T. KONDO(Graduate School of Science, Nagoya University)
• H. KANEDA(Graduate School of Science, Nagoya University)
• S. OYABU(Graduate School of Science, Nagoya University)
• D. ISHIHARA(Graduate School of Science, Nagoya University)
• T. MORI(Graduate School of Science, Nagoya University)
• M. YAMAGISHI(Graduate School of Science, Nagoya University)
• T. ONAKA(Graduate School of Science, The University of Tokyo)
• I. SAKON(Graduate School of Science, The University of Tokyo)
• T. SUZUKI(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)