IllustrisTNG中跨尺度的本征多相气体-黑洞连接
The Intrinsic Multiphase Gas--Black Hole Connection across Scales in IllustrisTNG
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中文总结 AI 辅助
研究超大质量黑洞与多相星系际介质关系，借助IllustrisTNG100模拟，测量黑洞质量与不同温度气体质量偏相关，发现黑洞质量与R₂₀₀和0.15R₂₀₀内冷气体显著负相关，为AGN反馈提供诊断及预测。
中文摘要 AI 辅助
超大质量黑洞与多相星系际介质之间的关系是理解星系及其中心黑洞共同演化的核心。我们使用IllustrisTNG100模拟，对5089个z = 0的中心星系样本进行研究，在考虑恒星和暗物质晕质量后，测量中心黑洞质量与0.03R₂₀₀、0.15R₂₀₀和R₂₀₀内冷（T < 10⁴K）、凉（10⁴ ≤ T < 10⁵K）、暖（10⁵ ≤ T < 10⁶K）和热（T ≥ 10⁶K）气体质量之间的偏相关。发现去除混杂因素后，黑洞质量与R₂₀₀和0.15R₂₀₀内的冷气体呈现显著负偏相关（ρ ≈ -0.37），而暖气体和热气体无显著本征相关。残余平面显示出阈值模式，超大质量黑洞的星系冷气体系统减少，与AGN反馈的累积影响一致。这种反相关在不同环境中持续存在，随星系类型（恒星形成、绿谷和熄灭）而变化。这些结果为TNG中的AGN反馈提供了定量多相诊断，支持反馈逐渐去除冷气体的图景，并为未来多波长调查提供了可测试的预测。
英文摘要
The relationship between supermassive black holes and the multiphase circumgalactic medium is central to understanding the co-evolution of galaxies and their central black holes. We investigate this relationship using the IllustrisTNG100 simulation with a sample of 5089 central galaxies at $z=0$, measuring the partial correlation between central black hole mass and the mass of cold ($T < 10^4$K), cool ($10^4 \le T < 10^5$K), warm ($10^5 \le T < 10^6$K), and hot ($T \ge 10^6$K) gas within $0.03R_{200}$, $0.15R_{200}$, and $R_{200}$, after accounting for stellar and dark matter halo mass. We find that after removing these confounding factors, black hole mass shows a significant negative partial correlation ($ρ\approx -0.37$) with cold gas within $R_{200}$ and $0.15R_{200}$, whereas warm and hot gas exhibit no substantial intrinsic correlation. The residual plane reveals a threshold pattern: galaxies with over-massive black holes show systematically reduced cold gas, consistent with the cumulative impact of AGN feedback. The anti-correlation persists across environments with a weak trend in local density, and varies with galaxy type (star-forming, green valley, and quenched). These results provide a quantitative multiphase diagnostic of AGN feedback in TNG and support a picture in which feedback progressively removes cold gas, offering testable predictions for future multiwavelength surveys.
