THE FIRST HYPER-LUMINOUS INFRARED GALAXY DISCOVERED BY WISE
THE FIRST HYPER-LUMINOUS INFRARED GALAXY DISCOVERED BY WISE
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DOI：
10.1088/0004-637x/755/2/173
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发表时间：
2012-08-20
影响因子：
4.9
通讯作者：
Yan, Lin
中科院分区：
文献类型：
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作者：
Eisenhardt, Peter R. M.;Wu, Jingwen;Yan, Lin
我们报告了宽视场红外巡天探测器（WISE）发现的z = 2.452的源WISE J181417.29+341224.9，这是WISE巡天中发现的第一个超光源。WISE 1814+3412也是全天空样本的原型，类似于1000个极亮的“W1 W2-dropouts”（WISE在3.4和4.6 μ m处微弱或未检测到，在12或22 μ m处检测良好）。WISE数据和350 μ m的探测给出了3.7 × 10（13）L圆点的最小辐射热光度，与10（14）L圆点相似。后续的影像显示了附近的四个来源：一个类星体和两个z = 2.45的莱曼破裂星系（LBG），以及一颗M矮星星星。较亮的LBG主导热辐射。引力透镜是不可能的，因为源的位置和它们不同的光谱和颜色。主要的LBG光谱表明星星的形成速率类似于300 M圆点年（-1），占不到或接近10%的热光度。强22 μ m发射相对于350 μ m意味着温暖的尘埃有助于显着的光度，而通常与星爆较冷的尘埃受到限制的上限在1.1毫米。无线电发射类似于10倍以上的远红外/无线电相关性，表明活动星系核（AGN）存在。一个被遮蔽的活动星系核结合星暴和演化的恒星成分可以解释观测结果。如果黑洞质量遵循局部M-BH-bulge质量关系，则隐含的爱丁顿比大于或近似于4。WISE 1814+3412可能是一个被严重遮蔽的天体，活动星系核的活动峰值发生在星星形成的高峰期之前。
We report the discovery by the Wide-field Infrared Survey Explorer (WISE) of the z = 2.452 source WISE J181417.29+341224.9, the first hyperluminous source found in the WISE survey. WISE 1814+3412 is also the prototype for an all-sky sample of similar to 1000 extremely luminous "W1W2-dropouts" (sources faint or undetected by WISE at 3.4 and 4.6 mu m and well detected at 12 or 22 mu m). The WISE data and a 350 mu m detection give a minimum bolometric luminosity of 3.7 x 10(13) L-circle dot, with similar to 10(14) L-circle dot plausible. Follow-up images reveal four nearby sources: a QSO and two Lyman break galaxies (LBGs) at z = 2.45, and an M dwarf star. The brighter LBG dominates the bolometric emission. Gravitational lensing is unlikely given the source locations and their different spectra and colors. The dominant LBG spectrum indicates a star formation rate similar to 300 M-circle dot yr(-1), accounting for less than or similar to 10% of the bolometric luminosity. Strong 22 mu m emission relative to 350 mu m implies that warm dust contributes significantly to the luminosity, while cooler dust normally associated with starbursts is constrained by an upper limit at 1.1 mm. Radio emission is similar to 10 times above the far-infrared/radio correlation, indicating an active galactic nucleus (AGN) is present. An obscured AGN combined with starburst and evolved stellar components can account for the observations. If the black hole mass follows the local M-BH-bulge mass relation, the implied Eddington ratio is greater than or similar to 4. WISE 1814+3412 may be a heavily obscured object where the peak AGN activity occurred prior to the peak era of star formation.