论文标题
恒星反馈在局部调节星系生长的定量演示
A quantitative demonstration that stellar feedback locally regulates galaxy growth
论文作者
论文摘要
我们已将出色的种群合成应用于500个大小的区域，该区域是在穆塞仪仪观察到的102个星系盘样品中。我们得出了星形的历史记录，并特别分析了“最近”（$ 20 \ rm {myr} $）和“过去”（$ 570 \ rm {myr} $）年龄垃圾箱。使用恒星形成自我调节器模型，我们可以得出特定区域的局部质量加载因子，$η$，并发现该因子取决于局部恒星质量表面密度$σ_*$，与预测相一致，形成了包括超新星反馈在内的流体动力学模拟。我们使用恒星质量表面密度概要文件集成了本地$η$ - $σ_*$关系，从星系中的恒星结构调查（S4G）到得出全球质量加载因子，$η_{\ rm {g rm {g}} $，作为恒星质量的功能，$ m _*$。 $η_ {\ rm {g}} $ - $ m _*$关系与流体动力学宇宙缩放星系模拟非常吻合。此处开发的方法提供了一种测试恒星反馈的不同实现的强大方法，以检查其预测的现实程度。
We have applied stellar population synthesis to 500 pc sized regions in a sample of 102 galaxy discs observed with the MUSE spectrograph. We derived the star formation history and analyse specifically the "recent" ($20\rm{Myr}$) and "past" ($570\rm{Myr}$) age bins. Using a star formation self-regulator model we can derive local mass-loading factors, $η$ for specific regions, and find that this factor depends on the local stellar mass surface density, $Σ_*$, in agreement with the predictions form hydrodynamical simulations including supernova feedback. We integrate the local $η$-$Σ_*$ relation using the stellar mass surface density profiles from the Spitzer Survey of Stellar Structure in Galaxies (S4G) to derive global mass-loading factors, $η_{\rm{G}}$, as a function of stellar mass, $M_*$. The $η_{\rm{G}}$-$M_*$ relation found is in very good agreement with hydrodynamical cosmological zoom-in galaxy simulations. The method developed here offers a powerful way of testing different implementations of stellar feedback, to check on how realistic are their predictions.
