A TWO-PARAMETER MODEL FOR THE INFRARED/SUBMILLIMETER/RADIO SPECTRAL ENERGY DISTRIBUTIONS OF GALAXIES AND ACTIVE GALACTIC NUCLEI
A TWO-PARAMETER MODEL FOR THE INFRARED/SUBMILLIMETER/RADIO SPECTRAL ENERGY DISTRIBUTIONS OF GALAXIES AND ACTIVE GALACTIC NUCLEI
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DOI：
10.1088/0004-637x/784/1/83
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发表时间：
2014-02
期刊：
影响因子：
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通讯作者：
D. Dale;G. Helou;G. Magdis;L. Armus;T. Díaz-Santos;Yong Shi
中科院分区：
文献类型：
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作者：
D. Dale;G. Helou;G. Magdis;L. Armus;T. Díaz-Santos;Yong Shi
本文提出了一个双参数半经验模型，用于研究星系的光谱能量分布，这些星系的光谱能量分布对恒星形成和吸积盘活动的红外-亚毫米射电辐射都有贡献。这个模型建立在以前的恒星形成星系的单参数模型家族的基础上，并包括使用从斯皮策太空望远镜对正常星系的观测获得的平均模板对中红外辐射的更新。给出了基于多环芳烃当量宽度和宽带红外颜色的恒星形成/活动星系核诊断方法，并估计了中红外星系核分数的实例，该模型适用于大观测站附近的U/LIRG全天LIRG探测样本和红移为0μ的24≲m选定源的5个mJy无偏斯皮策星系外探测样本≲4。
A two-parameter semi-empirical model is presented for the spectral energy distributions of galaxies with contributions to their infrared–submillimeter–radio emission from both star formation and accretion disk-powered activity. This model builds upon a previous one-parameter family of models for star-forming galaxies, and includes an update to the mid-infrared emission using an average template obtained from Spitzer Space Telescope observations of normal galaxies. Star-forming/active galactic nucleus (AGN) diagnostics based on polycyclic aromatic hydrocarbon equivalent widths and broadband infrared colors are presented, and example mid-infrared AGN fractional contributions are estimated from model fits to the Great Observatories All-Sky LIRG Survey sample of nearby U/LIRGS and the Five mJy Unbiased Spitzer Extragalactic Survey sample of 24 μm selected sources at redshifts 0 ≲ z ≲ 4.