论文标题
Lofar Deep Fields：探测Elais-N1中更广泛的两极分化射电星系
LOFAR Deep Fields: Probing a broader population of polarized radio galaxies in ELAIS-N1
论文作者
论文摘要
我们使用低频阵列（LOFAR）在114.9-177.4 MHz中介绍了欧洲大面积ISO Survey-North 1（Elais-N1）磁场的深偏光观测。 ELAIS-N1场是Lofar两米的天空调查深度数据发行I的一部分I。对于六个八个小时的观察时代，我们将两极分化的角度保持一致，并堆叠20英寸的分辨率$ q $，$ q $，$ u $ -parameter Data Ciotes。在本文中，我们证明了堆叠技术的可行性，我们在Elais-N1及其相关的Faraday旋转措施（RMS）中产生了一个偏光源，而在单周期观察中，我们检测到三个极性来源，这一数字在我们的三个层面上增加了一个偏差。 DEG $^2 $。
We present deep polarimetric observations of the European Large Area ISO Survey-North 1 (ELAIS-N1) field using the Low Frequency Array (LOFAR) at 114.9-177.4 MHz. The ELAIS-N1 field is part of the LOFAR Two-metre Sky Survey deep fields data release I. For six eight-hour observing epochs, we align the polarization angles and stack the 20"-resolution Stokes $Q$, $U$-parameter data cubes. This produces a 16 deg$^2$ image with 1$σ_{\rm QU}$ sensitivity of 26 $μ$Jy/beam in the central area. In this paper, we demonstrate the feasibility of the stacking technique, and we generate a catalog of polarized sources in ELAIS-N1 and their associated Faraday rotation measures (RMs). While in a single-epoch observation we detect three polarized sources, this number increases by a factor of about three when we consider the stacked data, with a total of ten sources. This yields a surface density of polarized sources of one per 1.6 deg$^2$. The Stokes $I$ images of three of the ten detected polarized sources have morphologies resembling those of FR I radio galaxies. This represents a greater fraction of this type of source than previously found, which suggests that more sensitive observations may help with their detection.
