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1999•Symposium - International Astronomical UnionOpen access

The Mid-Infrared Spectral Properties of Starburst Galaxies and Active Galactic Nuclei

Oscar F. Laurent, I. Félix Mirabel

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Abstract

We present a new diagnostic tool based on mid-infrared spectra (5–16μm) for distinguishing the emission triggered by the active galactic nucleus (AGN) and by the star formation activity. We show that the AGN spectra, contrary to the starburst spectra, present an important continuum below 9μm and an absence of Unidentified Infrared Bands (UIBs).

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We present a new diagnostic tool based on mid-infrared spectra (5–16μm) for distinguishing the emission triggered by the active galactic nucleus (AGN) and by the star formation activity. We show that the AGN spectra, contrary to the starburst spectra, present an important continuum below 9μm and an absence of Unidentified Infrared Bands (UIBs).

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Available abstract

We present a new diagnostic tool based on mid-infrared spectra (5–16μm) for distinguishing the emission triggered by the active galactic nucleus (AGN) and by the star formation activity. We show that the AGN spectra, contrary to the starburst spectra, present an important continuum below 9μm and an absence of Unidentified Infrared Bands (UIBs).

Key concepts: Active galactic nucleus, Infrared, Astrophysics, Physics, Galaxy, Luminous infrared galaxy, Spectral line, Star formation

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