Far-infrared Properties of the Bright, Gravitationally Lensed Quasar J0439+1634 at z = 6.5
Far-infrared Properties of the Bright, Gravitationally Lensed Quasar J0439+1634 at z = 6.5
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DOI：
10.3847/1538-4357/ab2a02
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发表时间：
2019-06
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通讯作者：
Jinyi Yang;B. Venemans;Feige Wang;Xiaohui Fan;M. Novak;R. Decarli;F. Walter;M. Yue;E. Momjian;C. Keeton;Ran Wang;A. Zabludoff;Xue-bing Wu;F. Bian
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作者：
Jinyi Yang;B. Venemans;Feige Wang;Xiaohui Fan;M. Novak;R. Decarli;F. Walter;M. Yue;E. Momjian;C. Keeton;Ran Wang;A. Zabludoff;Xue-bing Wu;F. Bian
我们目前的IRAM北方扩展毫米阵列，詹姆斯克拉克麦克斯韦望远镜/亚毫米波普通用户测辐射热仪阵列-2和甚大阵列（VLA）的观测最遥远的已知引力透镜类星体，J 0439 +1634在z = 6.5。我们探测到强尘埃辐射，[C ii] 158 μm，[C i] 369 μm，[O i] 146 μm，CO（6-5），CO（7-6），CO（9-8），CO（10-9），H2O 31，2 − 22，1和H2O 32，1 − 31，2线，以及弱射电连续谱。强的[C ii]线给出了宿主星系的系统红移z = 6.5188 ± 0.0002。这种放大使J 0439 +1634成为z > 6的远红外（FIR）最明亮的类星体，在这个红移处检测到最明亮的[C ii]线。远红外区亮度为（3.4 ± 0.2）× 1013μ−1 L⊙，其中μ 2.6-6.6是宿主星系的放大率，根据HST成像的透镜配置估计。我们估计尘埃质量为（2.2 ± 0.1）× 109μ−1。用四条CO谱线计算的CO谱线能量分布与分子气体激发的双组分模型拟合得最好。从CO谱线得到的气体分子质量和碳原子质量的估计值是一致的，在（3.9-8.9）× 1010μ−1的范围内。[C ii]/[C i]、[C ii]/CO和[O i]/[C ii]线光度比表明了一个多组分的光解区模型。H2O 32，1 − 31，2线光度与LTIR的比值与本地和高红移超/超亮红外星系的数值一致。VLA观测揭示了一个未分辨的射电连续谱源，并表明J 0439 +1634是一个射电宁静类星体，R = 0.05-0.17。
We present IRAM NOrthern Extended Millimeter Array, James Clerk Maxwell Telescope/Submillimetre Common-User Bolometer Array-2 and Very Large Array (VLA) observations of the most distant known gravitationally lensed quasar, J0439+1634 at z = 6.5. We detect strong dust emission, [C ii] 158 μm, [C i] 369 μm, [O i] 146 μm, CO(6–5), CO(7–6), CO(9–8), CO(10–9), H2O 31,2−22,1, and H2O 32,1−31,2 lines, as well as a weak radio continuum. The strong [C ii] line yields a systemic redshift of the host galaxy to be z = 6.5188 ± 0.0002. The magnification makes J0439+1634 the far-infrared (FIR) brightest quasar at z > 6 known, with the brightest [C ii] line yet detected at this redshift. The FIR luminosity is (3.4 ± 0.2) × 1013μ−1 L⊙, where μ ∼2.6–6.6 is the magnification of the host galaxy, estimated based on the lensing configuration from HST imaging. We estimate the dust mass to be (2.2 ± 0.1) × 109μ−1 . The CO spectral line energy distribution using four CO lines are best fit by a two-component model of the molecular gas excitation. The estimates of molecular gas mass derived from CO lines, and atomic carbon mass are consistent, in the range of (3.9–8.9) × 1010μ−1 . The [C ii]/[C i], [C ii]/CO, and [O i]/[C ii] line luminosity ratios suggest a photodissociation region model with more than one component. The ratio of H2O 32,1−31,2 line luminosity to LTIR is consistent with values in local and high-redshift ultra-/hyper-luminous infrared galaxies. The VLA observations reveal an unresolved radio continuum source, and indicate that J0439+1634 is a radio-quiet quasar with R = 0.05–0.17.