星系的恒星形成历史：STARLIGHT-SDSS数据库之旅
The Star Formation Histories of galaxies: A tour through the STARLIGHT-SDSS database
摘要：
从星系的综合光谱中提取星系的恒星形成历史是恒星星族合成的核心目标。进化综合模型的最新进展为这个古老的研究领域注入了新的活力。现代光谱合成技术，结合这些进步，现在允许拟合星系光谱上的埃的基础上。这些详细的拟合对许多研究都很有用，如发射线，恒星运动学，特别是星系演化。将这种半经验方法应用于大型数据集，可以教会我们很多关于星系生命的知识。STARLIGHT光谱合成代码是一种工具，它允许人们利用数据和模型的这种有利组合。为了说明这一点，我们展示了SFHS如何在经典的发射线诊断图中变化。沿着恒星形成和活动星系序列都存在系统性趋势。我们还简要介绍了新版本的进化合成模型的实验。最后但并非最不重要的是，我们宣布STARLIGHT和SDSS中超过50万个星系的详细光谱拟合和相关产品数据库的公开可用性。这个设施允许更多的物理启发的参数空间的探索比可能的原始观测属性，提供了新的方式来导航通过星系的领域。
英文摘要：
Retrieving the Star Formation History (SFH) of a galaxy out of its integrated spectrum is the central goal of stellar population synthesis. Recent advances in evolutionary synthesis models have given new breath to this old field of research. Modern spectral synthesis techniques incorporating these advances now allow the fitting of galaxy spectra on an angstrom-by-angstrom basis. These detailed fits are useful for a number of studies, like emission line, stellar kinematics, and specially galaxy evolution. Applications of this semi-empirical approach to mega data sets are teaching us a lot about the lives of galaxies. The STARLIGHT spectral synthesis code is one of the tools which allows one to harness this favorable combination of plentifulness of data and models. To illustrate this, we show how SFHs vary across classical emission line diagnostic diagrams. Systematic trends are present along both the star-forming and active-galaxy sequences. We also briefly describe experiments with new versions of evolutionary synthesis models. Last but not least, we announce the public availability of both STARLIGHT and a database of detailed spectral fits and related products for over half a million galaxies from the SDSS. This facility allows more physically inspired explorations of the parameter space than is possible in terms of raw observed properties, offering new ways to navigate through the realm of galaxies.
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