论文标题
高分辨率VLA成像被遮盖的类星体：年轻的无线电飞机捕获在密集的ISM中
High-resolution VLA Imaging of Obscured Quasars: Young Radio Jets Caught in a Dense ISM
论文作者
论文摘要
我们在10 GHz的155个超薄阵列（$ l _ {\ rm bol} \ sim10^{11.7-14.2} l _ \ odot $）上，以10 GHz的成像为10 ghz的新型sub-arcsecond karl G. Jansky成像（$ l _ {\ rm bol} \ sim10^{\ rm bol} \ sim10^{11.7-14.2} l _ \ odot $），并带有hevily of sim z $ s $ s $ sims $ sims。根据宽场红外调查探险器（WISE）的数据，选择样品具有极红色的中红外（miR）光颜色比率，以及检测到NRAO VLA天空调查（NVSS）的明亮，未解决的无线电发射，或在二十美分（第一）调查的无线电天空的微弱图像（首先）。我们的高分辨率VLA观察结果表明，我们样本中的大多数来源（155个中的93个）在角度尺度上紧凑$ <0.2^{\ prime \ prime} $（$ \ leq 1.7 $ kpc in $ z \ sim2 $）。我们来源的无线电亮度，线性扩展和叶压力类似于年轻的无线电活性银河核（AGN；例如，Gigahertz峰值频谱，GPS和紧凑型陡峭的频谱，CSS，CSS，源），但它们的空间密度较低。简单的绝热叶扩展模型的应用建议相对较年轻的动力学年龄（$ \ sim10^{4-7} $年），相对较高的环境ISM密度（$ \ sim1-10^4 $ cm $^{ - 3} $），以及适中的lobe扩展速度（$ \ sim30-10,000 $ km s $ km s $ km s $ km s $ km s $ km s $ km s $} $} $} $} $}。因此，我们发现我们的资源与在独特的进化阶段被捕获的新触发的年轻喷气机一致，在该阶段中，它们仍然居住在宿主的密集气库中。基于它们的无线电发光功能和动态年龄，我们仅估计经典的大型FRI/II射线星系的$ \ sim20 \％$可以直接从这些对象中演变出来。我们推测，Wise-NVSS来源可能首先成为GPS或CSS来源，其中有些人最终可能会演变为更大的射电星系。
We present new sub-arcsecond-resolution Karl G. Jansky Very Large Array (VLA) imaging at 10 GHz of 155 ultra-luminous ($L_{\rm bol}\sim10^{11.7-14.2} L_\odot$) and heavily obscured quasars with redshifts $z \sim0.4-3$. The sample was selected to have extremely red mid-infrared (MIR)-optical color ratios based on data from Wide-Field Infrared Survey Explorer (WISE) along with a detection of bright, unresolved radio emission from the NRAO VLA Sky Survey (NVSS) or Faint Images of the Radio Sky at Twenty-Centimeters (FIRST) Survey. Our high-resolution VLA observations have revealed that the majority of the sources in our sample (93 out of 155) are compact on angular scales $<0.2^{\prime \prime}$ ($\leq 1.7$ kpc at $z \sim2$). The radio luminosities, linear extents, and lobe pressures of our sources are similar to young radio active galactic nuclei (AGN; e.g., Gigahertz Peaked Spectrum, GPS, and Compact Steep Spectrum, CSS, sources), but their space density is considerably lower. Application of a simple adiabatic lobe expansion model suggests relatively young dynamical ages ($\sim10^{4-7}$ years), relatively high ambient ISM densities ($\sim1-10^4$ cm$^{-3}$), and modest lobe expansion speeds ($\sim30-10,000$ km s$^{-1}$). Thus, we find our sources to be consistent with a population of newly triggered, young jets caught in a unique evolutionary stage in which they still reside within the dense gas reservoirs of their hosts. Based on their radio luminosity function and dynamical ages, we estimate only $\sim20\%$ of classical large scale FRI/II radio galaxies could have evolved directly from these objects. We speculate that the WISE-NVSS sources might first become GPS or CSS sources, of which some might ultimately evolve into larger radio galaxies.
