A SPITZER HIGH-RESOLUTION MID-INFRARED SPECTRAL ATLAS OF STARBURST GALAXIES

被引:82
作者
Bernard-Salas, J. [1 ]
Spoon, H. W. W. [1 ]
Charmandaris, V. [2 ,3 ,4 ]
Lebouteiller, V. [1 ]
Farrah, D. [1 ,5 ]
Devost, D. [6 ]
Brandl, B. R. [7 ]
Wu, Yanling [1 ,8 ]
Armus, L. [8 ]
Hao, L. [1 ,9 ]
Sloan, G. C. [1 ]
Weedman, D. [1 ]
Houck, J. R. [1 ]
机构
[1] Cornell Univ, Ithaca, NY 14853 USA
[2] Univ Crete, Dept Phys, GR-71003 Iraklion, Greece
[3] Fdn Res & Technol Hellas, IESL, GR-71110 Iraklion, Greece
[4] Observ Paris, F-75014 Paris, France
[5] Univ Sussex, Dept Phys & Astron, Brighton BN1 9QH, E Sussex, England
[6] Canada France Hawaii Telescope Corp, Kamuela, HI 96743 USA
[7] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands
[8] CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA
[9] Univ Texas Austin, Dept Astron, Austin, TX 78712 USA
关键词
galaxies: starburst; infrared: galaxies; ISM: lines and bands; ULTRALUMINOUS INFRARED GALAXIES; POLYCYCLIC AROMATIC-HYDROCARBONS; WARM MOLECULAR-HYDROGEN; HII REGION CONNECTION; STAR-FORMATION RATES; SPACE-TELESCOPE; ELEMENTAL ABUNDANCES; PLANETARY-NEBULAE; INTERSTELLAR-MEDIUM; ISO SPECTROSCOPY;
D O I
10.1088/0067-0049/184/2/230
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present an atlas of Spitzer/IRS high-resolution (R similar to 600) 10-37 mu m 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 mu m), the spectra reveal other weak hydrocarbon features at 10.6, 13.5, 14.2 mu m, and a previously unreported emission feature at 10.75 mu m. An unidentified absorption feature at 13.7 mu m 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 Hi 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.
引用
收藏
页码:230 / 247
页数:18
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