Journal Article

An atlas of mid-infrared spectra of star-forming and active galaxies

A. Hernán-Caballero and E. Hatziminaoglou

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 414, issue 1, pages 500-511
Published in print June 2011 | ISSN: 0035-8711
Published online June 2011 | e-ISSN: 1365-2966 | DOI:
An atlas of mid-infrared spectra of star-forming and active galaxies

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We present a panoramic atlas of Spitzer/Infrared Spectrograph (IRS) spectra of extragalactic sources collected from the recent literature, with value-added measurements of their spectral features obtained in a homogeneous and concise manner. The atlas covers the full spectrum of the extragalactic Universe and includes star-forming galaxies, obscured and unobscured active galaxies, luminous and ultra-luminous infrared galaxies, and hybrid objects. Measured features such as the polycyclic aromatic hydrocarbons, the strength of the silicates in emission or absorption around 9.7 μm, rest-frame monochromatic luminosities or colours, combined with measurements derived from spectral decomposition are used to establish diagnostics that allow for classification of sources, based on their infrared properties alone. Average templates of the various classes are also derived. The full atlas with the value-added measurements and ancillary archival data are publicly available at, with full references to the original data.

Keywords: galaxies: active; quasars: general; galaxies: Seyfert galaxies: starburst; infrared: galaxies; infrared: general

Journal Article.  8995 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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