AI 中文总结
研究星系周围金属传输难题，通过分析暗能量光谱仪调查的星系对，发现与大质量主星系短轴对齐的邻近星系存在各向异性金属过剩，与模拟一致，为反馈模型提供经验约束并补充环境过程。
AI 中文摘要
星系与其周围环境之间的物质和能量交换驱动着宇宙重子循环，但绘制金属传输图仍是一个观测挑战。虽然模拟预测星系风沿短轴各向异性逃逸，但邻近星系化学富集的证据有限。我们分析了暗能量光谱仪调查中的1433对星系，发现在与大质量主星系短轴对齐的邻近星系中，在15至60千秒差距的投影距离处，气相金属丰度过剩14.6%±3.7%至24.2%±2.6%。该信号与IllustrisTNG模拟定性一致，在15至30千秒差距处为边缘检测（>92%置信度），在30至60千秒差距处为显著信号（>98%置信度）。我们表明，这种各向异性金属过剩与通过星系外流进行富集的情景一致，为反馈模型提供了经验约束，并补充了其他环境过程。
英文摘要
The exchange of matter and energy between galaxies and their surroundings drives the cosmic baryon cycle, yet mapping metal transport remains an observational challenge. While simulations predict that galactic winds escape anisotropically along minor axes, evidence for chemical enrichment in neighboring galaxies is limited. We analyze 1,433 galaxy pairs from the Dark Energy Spectroscopic Instrument survey and detect a gas-phase metallicity excess of 14.6% $\pm$ 3.7% to 24.2% $\pm$ 2.6% in neighbors aligned with the minor axis of massive primary at projected separations of 15--60 kpc. This signal, qualitatively consistent with IllustrisTNG simulation, varies from a marginal detection (>92% confidence) at 15--30 kpc to a significant signal (>98% confidence) at 30--60 kpc. In this work, we show that this anisotropic metallicity excess is consistent with a scenario of enrichment via galactic outflows, providing empirical constraints on feedback models and complementing other environmental processes.
Comments10+23 pages, 3+9 figures. Accepted in principle by Nature Communications. This is the authors' manuscript version
