标题： 表面亮度波动作为恒星种群的指示器 显示英文标题

标题： Surface Brightness Fluctuations as Stellar Population Indicators

摘要： 表面亮度起伏（SBF）可以提供关于早型星系和旋涡星系核球中未分辨恒星组成的有用信息。 在给定的波段中，绝对SBF星等Mbar取决于恒星种群的特性，并可以通过种群合成模型进行预测。 不同波段的SBF测量对星系恒星种群中的不同演化阶段敏感。 近红外SBF星等对AGB阶段内恒星的演化敏感，尤其是热脉动AGB阶段，而蓝光和紫外波段的SBF则对热水平分支和AGB后阶段敏感。 因此，多波段SBF研究可以限制重要的演化参数。 经验上，光学光谱红端的SBF数据（i、z以及可能的y波段）仍然是出色的距离指示器。 我简要回顾了一些最近使用SBF研究恒星种群的工作，主要从观测的角度进行。 显示英文摘要

摘要： Surface Brightness Fluctuations (SBF) can provide useful information about the unresolved stellar content of early-type galaxies and spiral bulges. The absolute SBF magnitude Mbar in a given passband depends on the properties of the stellar population and can be predicted by population synthesis models. SBF measurements in different bandpasses are sensitive to different evolutionary stages within the galaxy stellar population. Near-IR SBF magnitudes are sensitive to the evolution of stars within the AGB phase, especially the thermally pulsing AGB, while SBF in the blue and UV are sensitive to the hot horizontal branch and post-AGB stages. Thus, multi-band SBF studies can constrain important evolutionary parameters. Empirically, SBF data at the red end of the optical spectrum (i, z, and potentially y) remain excellent distance indicators. I briefly review some recent work on stellar populations using SBF, primarily from an observational point of view.