An atlas of mid-infrared spectra of galaxy nuclei

Astronomy and Astrophysics – Astronomy

Scientific paper

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Active Galactic Nuclei, Infrared Spectra, Spectral Energy Distribution, Absorption Spectra, Astronomical Spectroscopy, Emission Spectra, H Ii Regions, Infrared Astronomy Satellite

Scientific paper

The spectral energy distributions are presented for 60 galaxies for which 8-13-micron, and in some cases 17-23-micron, spectra have been obtained. It is shown how the detailed shape of the 8-13-micron spectrum, and in particular the presence or absence of spectral features, relates to other IR properties. The surprising variety in the 10-micron properties and spectral energy distribution of active galaxies, which contrasts with the homogeneity of those nuclei which are dominated by H II region emission, is demonstrated.

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