Abstract
Asymptotic Giant Branch (AGB) stars and post-AGB stars are thought to be major dust sources in galaxies. Investigation of dust in planetary nebulae (PNe), their successors, reveals properties of dust grains injected into the interstellar medium. The near-infrared (2.5-5.0 μm) emission of PNe consists of hot dust continuum, emission lines of ionized gases, and emission bands of carbonaceous dust grains. This wave range, however, has not been well investigated due to the lack of instruments with a high sensitivity. We conducted spectroscopic observations of PNe with the AKARI, obtaining 2.5-5.0 μm spectra of 72 Galactic PNe with a sensitivity of a few mJy. The spectra and the intensities of emission features are compiled as a catalog. The characteristics of the catalog are described.
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