论文标题
在CROC模拟时期电离时期期间的质量金属关系
Mass-Metallicity Relation during the Epoch of Reionization in the CROC Simulations
论文作者
论文摘要
对低偏移质量金属关系（MZR）进行了充分的研究，但是高红移MZR仍然很难观察到。为了进一步研究MZR早期，我们分析了计算机模拟（CROC）模拟的宇宙电离，重点是从红移5到10的MZR。我们发现，在所有红移中，croc星系都表现出相似的恒星阶段和气相，气体阶段和气体阶段MZR，具有较高的Stellar质量。我们将这种扁平化归因于CROC中不准确的恒星形成和反馈建模（恒星形成在巨大的Croc星系中过度抑制）。此外，我们表明，随着恒星年龄的增加，恒星金属性和气体金属性（$ z _*/z_ {gas} $）之间的比率降低，这意味着在Croc Galaxies中，气体积聚率低于金属生产率。使用JWST，我们将能够将我们的预测与对电离时代的观察进行比较，并理解更好的早期星系形成。
The low-redshift mass-metallicity relation (MZR) is well studied, but the high-redshift MZR remains difficult to observe. To study the early MZR further, we analyze the Cosmic Reionization on Computers (CROC) simulations with a focus on the MZR from redshifts 5 to 10. We find that, across all redshifts, CROC galaxies exhibit similar stellar-phase and gas-phase MZRs that flatten with higher stellar mass. We attribute this flattening to the inaccurate star formation and feedback modeling in CROC (star formation is overly suppressed in massive CROC galaxies). In addition, we show that the ratio between stellar metallicity and gas metallicity ($Z_*/Z_{gas}$) decreases as stellar age increases, meaning that in CROC galaxies, gas accretion rate is lower than metal production rate. With JWST we will be able to compare our predictions to observations of the Epoch of Reionization and understand better early galaxy formation.
