SMA High Angular Resolution Imaging of the Lensed Quasar APM 08279+5255
SMA High Angular Resolution Imaging of the Lensed Quasar APM 08279+5255
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透镜 Quasar APM 的 SMA 高角分辨率成像 08279 5255
DOI：
10.1086/524704
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
D. Iono
中科院分区：
文献类型：
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作者：
M. Krips;A. Peck;K. Sakamoto;G. Petitpas;D. Wilner;S. Matsushita;D. Iono
本文报道了z = 3.91的引力透镜宽吸收线类星体APM 08279+5255的亚毫米波射电阵列观测结果，它能分辨1.0 mm（200 μm静止坐标系）的尘埃连续辐射。在0.4“分辨率下，辐射被分成两个分量，一个是较强的，向东北方向延伸的分量（46 ± 5 mJy），另一个是较弱的，向西南方向紧凑的分量（15 ± 2 mJy）。我们已经进行了模拟的引力透镜效应负责的两个亚毫米波组件，以约束的亚毫米波连续辐射的内在尺寸。使用椭圆透镜势，最佳拟合透镜模型产生的固有（投影）直径约为80 pc，这是不紧凑的光学/近红外（NIR）的排放和同意与APM 08279+5255中的气体和尘埃排放的尺寸估计。根据我们的估计，我们倾向于这样一种情况，即200 μm（静止帧）的发射来自一个温暖的尘埃成分（Td = 150-220 K），主要是由活动星系核加热，而不是由星暴。在我们的模型中，通量增加了约90倍，与最近对APM 08279+5255的估计一致。
We present Submillimeter Array observations of the z = 3.91 gravitationally lensed broad absorption line quasar APM 08279+5255 which spatially resolve the 1.0 mm (200 μm rest frame) dust continuum emission. At 0.4'' resolution, the emission is separated into two components, a stronger, extended one to the northeast (46 ± 5 mJy) and a weaker, compact one to the southwest (15 ± 2 mJy). We have carried out simulations of the gravitational lensing effect responsible for the two submillimeter components in order to constrain the intrinsic size of the submillimeter continuum emission. Using an elliptical lens potential, the best-fit lensing model yields an intrinsic (projected) diameter of ~80 pc, which is not as compact as the optical/near-infrared (NIR) emission and agrees with previous size estimates of the gas and dust emission in APM 08279+5255. Based on our estimate, we favor a scenario in which the 200 μm (rest frame) emission originates from a warm dust component (Td = 150-220 K) that is mainly heated by the AGN rather than by a starburst. The flux is boosted by a factor of ~90 in our model, consistent with recent estimates for APM 08279+5255.