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arXiv 0908.2812astro-ph.CO
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星暴星系的斯皮策高分辨率中红外光谱图集

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, J. R. Houck

摘要:

本文给出了24个著名星暴星系的Spitzer/IRS高分辨率(R~600)10- 37 μ m光谱图集。光谱主要由精细结构线,分子氢线,和多环芳烃的发射带。在八个已知活动星系核成分的天体中,有六个显示出高激发[NeV]谱线的发射。这条线也在另一个物体(NGC 4194)中看到,先验地,没有已知的活动星系核成分。除了在该波长范围(11.3,12.7,16.4 μ m)的强多环芳烃发射特征外,光谱还揭示了10.6,13.5,14.2 μ m的其他弱烃特征,以及先前未报道的10.75 μ m发射特征。在许多星暴中发现了13.7 μ m的不明吸收特征。我们使用的精细结构线,以获得丰富的氖和硫的14个对象的HI 7-6线检测。我们进一步利用分子氢谱线对热分子气体的性质进行取样。还显示了表征样品性质的几个基本图表。我们结合了所有纯星爆天体的光谱,创建了一个高S/N模板,可供社区使用。

英文摘要:

We present an atlas of Spitzer/IRS high resolution (R~600) 10-37um 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. Six out of the eight objects with a known AGN component show emission of the high excitation [NeV] line. This line is also seen in one other object (NGC4194) with, a priori, no known AGN component. In addition to strong polycyclic aromatic hydrocarbon emission features in this wavelength range (11.3, 12.7, 16.4um), the spectra reveal other weak hydrocarbon features at 10.6, 13.5, 14.2um, and a previously unreported emission feature at 10.75um. An unidentified absorption feature at 13.7um 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 S/N template, which is available to the community.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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