论文标题
用放射性抗体探测AGN喷气机及其磁场的最内向区域。 iii。 Blazar S5 0716+71在Microarcsecond分辨率下
Probing the innermost regions of AGN jets and their magnetic fields with RadioAstron. III. Blazar S5 0716+71 at microarcsecond resolution
论文作者
论文摘要
我们介绍了BL LAC对象S5 0716+71在2015年1月3日至4日以22 GHz的频率（波长$λ= 1.3 $ cm）制造的BL LAC对象S5 0716+71的VLBI成像观测值。观察结果是在AGN极化关键科学计划的框架内进行的。对于平行的手和跨手干涉可见性，在高达70 833 km（5.6接地直径）的投影空间基线上检测到了源。我们已经使用这些检测来以前所未有的角度分辨率为24 $μ$ AS，以获取大黄花的全偏光图像，这是迄今为止此源的最高分。这使我们能够估计无线电芯的尺寸为$ <12 \ times5〜μ $，并揭示了内部100 $μ$ AS中Blazar Jet的复杂结构和明显的曲率，这表明喷气式视角位于喷气式圆锥形流出的开放角度内。相当高（15％）的线性极化排放在大小的19 $μ$中被检测到，位于58 $μ$的尺寸，与核心的下游。源框架中的最高亮度温度估计为$> 2.2 \ times10^{13} $ k对于Blazar Core。这意味着，即使对于最大的多普勒因子$δ\厚25 $，compton限制也必须在源的其余框架中违反0716+714的厚度。
We present RadioAstron Space VLBI imaging observations of the BL Lac object S5 0716+71 made on January 3-4 2015 at a frequency of 22 GHz (wavelength $λ=1.3$ cm). The observations were made in the framework of the AGN Polarization Key Science Program. The source was detected on projected space-ground baselines up to 70 833 km (5.6 Earth diameters) for both, parallel hand and cross-hand interferometric visibilities. We have used these detections to obtain a full-polarimetric image of the blazar at an unprecedented angular resolution of 24 $μ$as, the highest for this source to date. This enabled us to estimate the size of the radio core to be $<12\times5~μ$as and to reveal a complex structure and a significant curvature of the blazar jet in the inner 100 $μ$as, which is an indication that the jet viewing angle lies inside the opening angle of the jet conical outflow. Fairly highly (15%) linearly polarized emission is detected in a jet region of 19 $μ$as in size, located 58 $μ$as downstream from the core. The highest brightness temperature in the source frame is estimated to be $>2.2\times10^{13}$ K for the blazar core. This implies that the inverse Compton limit must be violated in the rest frame of the source, even for the largest Doppler factor $δ\thicksim25$ reported for 0716+714.
