A New Approach to Age-Dating Galaxies Throughout the Universe

虽然整个宇宙中的星系都是由暗物质主导的，但它们的年龄的确定必然取决于天文学家实际能看到的东西——潜在的恒星数量。从遥远星系的综合光谱学中解开年龄和金属丰度的相互竞争（和令人困惑的）影响是宇宙学中的一个强大工具，也是我们独特地准备利用的工具。该项目的一个成果将是发布最复杂的星系光谱合成模型，包括其他地方无法获得的物理和恒星输入。这些模型将作为我们澳大利亚领导的观测星团年龄测定计划的一部分进行校准。

While galaxies throughout the Universe are dominated by dark matter, the determination of their ages is necessarily dependent upon what astronomers can actually see - the underlying stellar population. Disentangling the competing (and confusing) effects of age and metallicity from the integrated spectroscopy of distant galaxies is a powerful tool in cosmology, and one which we are uniquely poised to exploit. An outcome of this Fellowship will be the release of the most sophisticated spectral synthesis models of galaxies, including physics and stellar input not available elsewhere. These models will be calibrated as part of our Australian-led observational cluster age-dating program.