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A Spitzer High-resolution Mid-Infrared Spectral Atlas of Starburst Galaxies

Bernard-Salas, J. and Spoon, H. W. W. and Charmandaris, V. and Lebouteiller, V. and Farrah, D. and Devost, D. and Brandl, B. R. and Wu, Yanling and Armus, L. and Hao, L. and Sloan, G. C. and Weedman, D. and Houck, J. R. (2009) A Spitzer High-resolution Mid-Infrared Spectral Atlas of Starburst Galaxies. Astrophysical Journal Supplement Series, 184 (2). pp. 230-247. ISSN 0067-0049.

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We present an atlas of Spitzer/IRS high-resolution (R ~ 600) 10-37 μm spectra for 24 well known starburst galaxies. The spectra are dominated by fine-structure lines, molecular hydrogen lines, and emission bands of polycyclic aromatic hydrocarbons (PAHs). Six out of the eight objects with a known active galactic nucleus (AGN) component show emission of the high excitation [Ne V] line. This line is also seen in one other object (NGC 4194) with, a priori, no known AGN component. In addition to strong PAH emission features in this wavelength range (11.3, 12.7, 16.4 μm), the spectra reveal other weak hydrocarbon features at 10.6, 13.5, 14.2 μm, and a previously unreported emission feature at 10.75 μm. An unidentified absorption feature at 13.7 μm is detected in many of the starbursts. We use the fine-structure lines to derive the abundance of neon and sulfur for 14 objects where the H I 7-6 line is detected. We further use the molecular hydrogen lines to sample the properties of the warm molecular gas. Several basic diagrams characterizing the properties of the sample are also shown. We have combined the spectra of all the pure starburst objects to create a high signal-to-noise ratio template, which is available to the community.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Bernard-Salas, J.0000-0002-8452-8675
Spoon, H. W. W.0000-0002-8712-369X
Charmandaris, V.0000-0002-2688-1956
Farrah, D.0000-0003-1748-2010
Armus, L.0000-0003-3498-2973
Additional Information:© 2009 The American Astronomical Society. Received 2009 March 6; accepted 2009 August 14; published 2009 September 16. V.C. acknowledges partial support from the EU grants ToK 39965 and FP7-REGPOT 206469. We thank Ian Waters and Hongyu Xiao for their help with the line measurement.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
European Research Council (ERC)39965
European Research Council (ERC)206469
Subject Keywords:galaxies: starburst; infrared: galaxies; ISM: lines and bands
Issue or Number:2
Record Number:CaltechAUTHORS:20091021-090842548
Persistent URL:
Official Citation:A Spitzer High-resolution Mid-Infrared Spectral Atlas of Starburst Galaxies J. Bernard-Salas, H. W. W. Spoon, V. Charmandaris, V. Lebouteiller, D. Farrah, D. Devost, B. R. Brandl, Yanling Wu, L. Armus, L. Hao, G. C. Sloan, D. Weedman, and J. R. Houck 2009 ApJS 184 230-247 doi: 10.1088/0067-0049/184/2/230
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16419
Deposited By: Tony Diaz
Deposited On:26 Oct 2009 18:41
Last Modified:04 Nov 2019 22:08

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