Abstract
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 and the aliphatic hydrocarbon 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 ice and CO/SiO at the ring and the galactic center, while we detect the hydrogen recombination line only from the ring. Hence the observed spectra change dramatically within the central 1 kpc region.
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