A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). IX. The most overdense region at <i>z</i> ? 5 inhabited by a massive radio galaxy
A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). IX. The most overdense region at <i>z</i> ? 5 inhabited by a massive radio galaxy
复制标题
使用 Subaru HSC (WERGS) 对射电星系进行广泛而深入的探索。
DOI：
10.1093/pasj/psac075
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发表时间：
2022
影响因子：
2.3
通讯作者：
Saito Tomoki
中科院分区：
文献类型：
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作者：
Uchiyama Hisakazu;Yamashita Takuji;Nagao Tohru;Ono Yoshiaki;Toshikawa Jun;Ichikawa Kohei;Kawakatu Nozomu;Kajisawa Masaru;Toba Yoshiki;Matsuoka Yoshiki;Kubo Mariko;Imanishi Masatoshi;Ito Kei;Kawaguchi Toshihiro;Lee Chien-Hsiu;Saito Tomoki
本文报道了一个z = 4.72的高z射电星系（HzRG），HSC J083913.17+011308.1（HSC J 0839 +0113）周围的星系密度环境，该星系是利用Hyper Suprime-Cam Subaru战略计划数据中的无脱落莱曼破裂星系（LBG）样本探测的。我们发现，HSCJ 0839 +0113位于一个过密区域的外围，该区域由4.7σ显著性水平的失超星系识别。HSC J 0839 +0113到过密区峰值位置的投影距离为0.4 Mpc，比该时期典型的原星团半径要小。根据扩展的Press-Schechter模型和光锥模型，HSC J 0839 +0113的过密区预计将演化为> 1014 atz = 0的晕，其概率很高。这些发现表明HSC J 0839 +0113与原星系团有关。HSC J 0839 +0113富星系是同宇宙时代已知的具有LBG的原星系团中LBG密度最高的区域。
We report on the galaxy density environment around a high-zradio galaxy (HzRG) atz= 4.72, HSC J083913.17+011308.1 (HSC J0839+0113), probed using anr-dropout Lyman break galaxy (LBG) sample from the Hyper Suprime-Cam Subaru Strategic Program data. We find that HSC J0839+0113 resides in the outskirts of an overdense region identified by ther-dropout galaxies at a 4.7σ significance level. The projected distance between HSC J0839+0113 and the peak position of the overdense region is 0.4 physical Mpc, which is shorter than the typical protocluster radius in this epoch. According to the extended Press–Schechter and the light cone models, the HSC J0839+0113-hosted overdense region is expected to evolve into a halo >1014atz= 0 with a high probability of. These findings suggest that HSC J0839+0113 is associated with a protocluster. The HSC J0839+0113 rich-system is the most overdense region of LBGs among the known protoclusters with LBGs in the same cosmic epoch.