• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Astrophysical journal >AGN HOST GALAXIES AT z ～ 0.4-1.3: BULGE-DOMINATED AND LACKING MERGER-AGN CONNECTION
【24h】

AGN HOST GALAXIES AT z ～ 0.4-1.3: BULGE-DOMINATED AND LACKING MERGER-AGN CONNECTION

机译：z〜0.4-1.3处的AGN主机星系：凸起的和缺乏合并的AGN连接

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We investigate morphological structure parameters and local environments of distant moderate-luminosity active galactic nucleus (AGN) host galaxies in the overlap between the HST/ACS observations of the Great Observatories Origins Deep Survey (GOODS) and the two Chandra Deep Fields. We compute near-neighbor counts and BViz asymmetry (A) and concentration (C) indices for ≈35,500 GOODS/ACS galaxies complete to z_(850) ≈ 26.6, including the resolved hosts of 322 X-ray-selected AGNs. Distributions of (1) z_(850) asymmetry for 130 z_(850) < 23 AGN hosts and (2) near-neighbor counts for 173 z_(850) < 24 AGN hosts are both consistent with non-AGN control samples. This implies no close connection between recent galaxy mergers and moderate-luminosity AGN activity out to appreciable look-back times (z approx < 1.3), approaching the epoch of peak AGN activity in the universe. The distribution of z_(850) C for the AGN hosts is offset by ΔC ≈ +0.5 compared to the non-AGN, a 6.4 σ discrepancy much larger than can be explained by the possible influence of unresolved emission from the AGN or a circumnuclear starburst. The local universe association between AGN and bulge-dominated galaxies thus persists to substantial look-back time. We discuss implications in the context of the low-redshift supermassive central black hole mass correlation with host galaxy properties, including concentration.
机译：我们在大天文台起源深层调查（GOODS）和两个钱德拉深场的HST / ACS观测之间的重叠中调查了遥远的中度发光活跃银河核（AGN）宿主星系的形态结构参数和局部环境。我们计算出完整的z_（850）≈26.6的≈35,500GOODS / ACS星系的近邻计数和BViz不对称性（A）和浓度（C）指数，其中包括322个X射线选择的AGN的解析宿主。 130 z_（850）<23 AGN主机的（1）z_（850）不对称分布和173 z_（850）<24 AGN主机的（2）近邻计数均与非AGN对照样本一致。这意味着最近的星系合并与中等发光度的AGN活动与可观的回溯时间（z约<1.3）之间没有紧密的联系，接近宇宙中AGN活动高峰的时代。与非AGN相比，AGN主机的z_（850）C的分布被ΔC≈+0.5抵消，其6.4σ差异比AGN的未解析发射或星核爆炸可能产生的影响要大得多。因此，AGN与以凸起为主导的星系之间的局部宇宙联系持续了相当长的回顾时间。我们讨论了低红移超大质量中心黑洞质量与主机星系特性（包括浓度）的相关性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号