论文标题
XMM $ - $ LSS Deep Field中残留射电星系的搜索和表征
Search and characterization of remnant radio galaxies in the XMM$-$LSS deep field
论文作者
论文摘要
射电星系的残余阶段的特征是停止AGN活性，导致停止向无线电裂片提供等离子体的喷气机。在本文中，我们介绍了{\ em xmm $ - $ - $ - $ - $ - newton}的搜索和表征，在12.5 deg $^{2} $中，通过使用325 MHz的深度无线电观测值，从巨大的Metrewave Proface（Gmrt）中的325 MHz中使用325 MHz的深度无线电观测来使用325 MHz的深度无线电观测，从而在150 MHz（lof）（lof）（gmhz），在150 MH）来自Jansky的GHz非常大的阵列（JVLA），以及VLA Sky Survey（Vlass）的3 GHz。通过使用两个形态标准{\ viz}未检测到的无线电核心以及光谱标准{\ viz}高光谱曲率和Ultra $ - $ - $陡峭的频谱，我们确定了21个残留的候选者，这些候选者主要在非$ - $ cluster Environments中发现了多种多样的属性，并且在Morphology，Spectralology，Spectralogy，spectralogy，spectralogy，spectralogy，spectralogy，spectralology and intral opply propperial comply propperipal intarmology complanty proppect中（ 150}^{\ rm 1400} $在$ -1.71 $到$ -0.75 $的范围内，中位数为$ -1.10 $）和线性无线电大小（范围从242 kpc到1.3 MPC到1.3 MPC，中位数为469 kpc）。我们的研究试图将残留的候选者识别为325 MHz时的磁通密度限制为6.0 MJY，并在残留分数（$ f _ {\ rm rem} $）上产生上限的上限，约为5 $ \％$。观察到的$ f _ {\ rm rem} $似乎与假设有电动相位持续时间和索引索引$ -0.8 $至$ -1.2 $的动力法分布的进化模型的预测一致。
The remnant phase of a radio galaxy is characterized by the cessation of AGN activity resulting in the stoppage of jets supplying plasma to radio lobes. In this paper, we present the search and characterization of remnant candidates in 12.5 deg$^{2}$ of the {\em XMM$-$Newton} Large$-$Scale Structure (XMM$-$LSS) field by using deep radio observations at 325 MHz from the Giant Metrewave Radio Telescope (GMRT), at 150 MHz from the LOw Frequency ARray (LOFAR), at 1.4 GHz from the Jansky Very Large Array (JVLA), and at 3 GHz from the VLA Sky Survey (VLASS). By using both morphological criteria {\viz}undetected radio core as well as spectral criteria {\viz}high spectral curvature, and ultra$-$steep spectrum, we identify 21 remnant candidates that are found to reside mostly in non$-$cluster environments, and exhibit diverse properties in terms of morphology, spectral index ($α_{\rm 150}^{\rm 1400}$ in the range of $-1.71$ to $-0.75$ with a median of $-1.10$), and linear radio size (ranging from 242 kpc to 1.3 Mpc with a median of 469 kpc). Our study attempts to identify remnant candidates down to the flux density limit of 6.0 mJy at 325 MHz, and yields an upper limit on the remnant fraction ($f_{\rm rem}$) to be around 5$\%$. The observed $f_{\rm rem}$ seems consistent with the predictions of an evolutionary model assuming power law distributions of the duration of active phase and jet kinetic power with index $-0.8$ to $-1.2$.
