The cosmic web of X-ray active galactic nuclei seen through the eROSITA Final Equatorial Depth Survey (eFEDS)
The cosmic web of X-ray active galactic nuclei seen through the eROSITA Final Equatorial Depth Survey (eFEDS)
复制标题
通过 eROSITA 最终赤道深度巡天 (eFEDS) 看到的 X 射线活跃星系核的宇宙网
DOI：
10.1051/0004-6361/202245726
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发表时间：
2023
影响因子：
6.5
通讯作者：
Akiyama, Masayuki
中科院分区：
文献类型：
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作者：
Comparat, Johan;Luo, Wentao;Merloni, Andrea;More, Surhud;Salvato, Mara;Krumpe, Mirko;Miyaji, Takamitsu;Brandt, William;Georgakakis, Antonis;Akiyama, Masayuki
在一般星系群中，哪些星系转变为活动星系核（agn）是星系形成和演化的关键。由于SRG/eROSITA的连续140平方度的试点调查领域，我们构建了一个大的、完整的、无偏的软x射线通量限制（FX> 6.5 × 10 - 15erg s - 1cm - 2）低红移AGN样品，0.05 <z< 0.55。利用SDSS-V的光谱聚类和HSC的星系-星系透镜成像，测量了两个汇总统计量，并用晕占度分布和丰度匹配模型进行了解释。两个模型都成功地解释了观测结果。我们获得了AGN光晕占位分布的异常完整的视图。agn的数量广泛分布在平均质量为的光晕中。这对应于大尺度光晕偏差。中心职业有较大的过渡参数，σlog10(M)= 1.28±0.2。卫星职业分布呈浅斜率分布，αsat= 0.73±0.38。我们发现卫星上的agn很少，小于20%。大多数软x射线选择的agn是由暗物质晕中的中心星系承载的。证实了软x射线光度与大尺度晕偏之间的弱相关（3.3σ）。我们讨论了环境依赖性AGN触发的含义。这项研究通过将eROSITA与SDSS-V、4MOST、DESI、LSST和deucliddata相结合，为在未来十年全面绘制x射线agn、它们的宿主星系和暗物质光环的共同演化铺平了道路。
Which galaxies in the general population turn into active galactic nuclei (AGNs) is a keystone of galaxy formation and evolution. Thanks to SRG/eROSITA’s contiguous 140 square degree pilot survey field, we constructed a large, complete, and unbiased soft X-ray flux-limited (FX> 6.5 × 10−15erg s−1cm−2) AGN sample at low redshift, 0.05 <z< 0.55. Two summary statistics, the clustering using spectra from SDSS-V and galaxy-galaxy lensing with imaging from HSC, are measured and interpreted with halo occupation distribution and abundance matching models. Both models successfully account for the observations. We obtain an exceptionally complete view of the AGN halo occupation distribution. The population of AGNs is broadly distributed among halos with a mean mass of . This corresponds to a large-scale halo bias of . The central occupation has a large transition parameter,σlog10(M)= 1.28 ± 0.2. The satellite occupation distribution is characterized by a shallow slope,αsat= 0.73 ± 0.38. We find that AGNs in satellites are rare, withfsat< 20%. Most soft X-ray-selected AGNs are hosted by central galaxies in their dark matter halo. A weak correlation between soft X-ray luminosity and large-scale halo bias is confirmed (3.3σ). We discuss the implications of environmental-dependent AGN triggering. This study paves the way toward fully charting, in the coming decade, the coevolution of X-ray AGNs, their host galaxies, and dark matter halos by combining eROSITA with SDSS-V, 4MOST, DESI, LSST, andEucliddata.