We have modelled the stellar and nebular continua and emission-line intensity ratios of massive stellar populations in the Antennae galaxy using high resolution and self-consistent libraries of model HII regions around central clusters of aging stars. The model libraries are constructed using the stellar population synthesis code, Starburst99, and photoionisation model, Cloudy. The Geneva and PARSEC stellar evolutionary models are plugged into Starburst99 to allow comparison between the two models. Using a spectrum-fitting methodology that allows the spectral features in the stellar and nebular continua (e.g. Wolf-Rayet features, Paschen jump), and emission-line diagnostics to constrain the models, we apply the libraries to the high-resolution MUSE spectra of the starbursting regions in the Antennae galaxy. Through this approach, we were able to model the continuum emission from Wolf-Rayet stars and extract stellar and gas metallicities, ages, electron temperatures and densities of starbursts by exploiting the full spectrum. From the application to the Antennae galaxy, we find that (1) the starbursts in the Antennae galaxy are characterised by stellar and gas metallicities of around solar, (2) the star-forming gas in starbursts in the Western loop of NGC 4038 appear to be more enriched, albeit slightly, than the rest of galaxy, (3) the youngest starbursts are found across the overlap region and over parts of the western-loop, though in comparison, the regions in the western-loop appear to be at a slightly later stage in star-formation than the overlap region, and (4) the results obtained from fitting the Geneva and Parsec models are largely consistent.

中文翻译：

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根据 MUSE 光谱的自洽建模，天线星系中星暴的恒星种群和物理特性

我们使用高分辨率和自洽的模型 HII 区域库模拟了天线星系中大量恒星群的恒星和星云连续体和发射线强度比。模型库是使用恒星群合成代码 Starburst99 和光电离模型 Cloudy 构建的。日内瓦和 PARSEC 恒星演化模型被插入到 Starburst99 中，以便在两个模型之间进行比较。使用允许恒星和星云连续体中的光谱特征（例如 Wolf-Rayet 特征、Paschen 跳跃）和发射线诊断来约束模型的光谱拟合方法，我们将这些库应用于触角星系中的星爆区。通过这种方法，我们能够模拟沃尔夫-拉叶星的连续发射，并通过利用全光谱提取星暴的恒星和气体金属丰度、年龄、电子温度和密度。通过对触角星系的应用，我们发现（1）触角星系中的星暴具有太阳周围恒星和气体金属丰度的特征，（2）NGC 4038西环星暴中的恒星形成气体似乎具有比星系的其余部分更丰富，尽管略有丰富，（3）在重叠区域和西环的部分区域发现了最年轻的星暴，尽管相比之下，西环的区域似乎处于恒星形成阶段比重叠区域稍晚，(4) 拟合Geneva 和Parsec 模型获得的结果基本一致。