论文标题
表面亮度波动，以限制大型星系的化学富集
Surface Brightness Fluctuations for constraining the chemical enrichment of massive galaxies
论文作者
论文摘要
基于非常深的光度法，传统上使用表面亮度波动（SBF）来确定星系距离。我们最近在适度高分辨率的恒星种群中计算了SBF光谱，这些分辨率完全基于经验恒星。我们表明，SBF光谱为出色的人群研究提供了前所未有的潜力，到目前为止，该研究已根据平均通量解决。我们发现SBF能够以1％的水平揭示金属贫困的恒星成分，这是不可能通过标准分析分解的。由于这些金属贫穷的成分对应于化学富集的第一阶段，因此SBF分析对淬火时期提供了严格的约束。
Based on very deep photometry, Surface Brightness Fluctuations (SBF) have been traditionally used to determine galaxy distances. We have recently computed SBF spectra of stellar populations at moderately high resolution, which are fully based on empirical stars. We show that the SBF spectra provide an unprecedented potential for stellar population studies that, so far, have been tackled on the basis of the mean fluxes. We find that the SBFs are able to unveil metal-poor stellar components at the one percent level, which are not possible to disentangle with the standard analysis. As these metal-poor components correspond to the first stages of the chemical enrichment, the SBF analysis provides stringent constrains on the quenching epoch.
