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arXiv 2501.09883astro-ph.GAastro-ph.IM
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结合深度学习与目视检查在FIRST巡天中识别4876个弯尾射电星系

Identification of 4876 Bent-Tail Radio Galaxies in the FIRST Survey Using Deep Learning Combined with Visual Inspection

Baoqiang Lao, Heinz Andernach, Xiaolong Yang, Xiang Zhang, Rushuang Zhao, Zhen Zhao, Yun Yu, Xiaohui Sun, Sheng-Li Qin

AI总结:

本研究结合深度学习射电源探测器与目视检查,从FIRST巡天中识别出4876个弯尾射电星系(含3871个新发现),构建了覆盖宽光度与红移范围的分类星表,并统计了其物理性质与星系团归属情况。

摘要:

弯尾射电星系(BTRGs)以弯曲的射电瓣为特征,这种独特形态主要由星系在星系团内的运动导致,期间射电喷流受到星系团内介质的偏折。本研究采用结合基于深度学习的射电源探测器与目视检查的组合方法,从Faint Images of the Radio Sky at Twenty-centimeters(二十厘米射电天空暗弱图像,简称FIRST)巡天图像中搜寻BTRGs。研究最终构建了包含4876个BTRGs的星表,其中3871个为新发现的天体。根据星系两个喷流间张角的分类方案,BTRGs通常被分为宽角尾(WAT)源和窄角尾(NAT)源两类;本次构建的星表包含4424个WAT和652个NAT,其中4193个BTRGs已识别出光学对应体。该星表覆盖的光度范围为$1.91\times10^{20} \leq L_{\rm 1.4\thinspace GHz} \leq 1.45\times10^{28}$ ${\rm W/Hz}$,红移范围为$z=0.0023$至$z=3.43$。研究还呈现了这些BTRGs的各类物理性质及其统计结果,特别地,通过最近邻方法发现,星表中有1825个BTRGs隶属于已发表文献报道的星系团。

英文摘要:

Bent-tail radio galaxies (BTRGs) are characterized by bent radio lobes. This unique shape is mainly caused by the movement of the galaxy within a cluster, during which the radio jets are deflected by the intra-cluster medium. A combined method, which involves a deep learning-based radio source finder along with visual inspection, has been utilized to search for BTRGs from the Faint Images of the Radio Sky at Twenty-centimeters survey images. Consequently, a catalog of 4876 BTRGs has been constructed, among which 3871 are newly discovered. Based on the classification scheme of the opening angle between the two jets of the galaxy, BTRGs are typically classified as either wide-angle-tail (WAT) sources or narrow-angle-tail (NAT) sources. Our catalog comprises 4424 WATs and 652 NATs. Among these, optical counterparts are identified for 4193 BTRGs. This catalog covers luminosities in the range of $1.91\times10^{20} \leq L_{\rm 1.4\,GHz} \leq 1.45\times10^{28}$ ${\rm W\,Hz^{-1}}$ and redshifts from $z = 0.0023$ to $z = 3.43$. Various physical properties of these BTRGs and their statistics are presented. Particularly, by the nearest neighbor method, we found that 1825 BTRGs in this catalog belong to galaxy clusters reported in literature.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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