高级形态学星系分类：真实星系与模拟星系的比较
Advanced Morphological Galaxy Classification: A Comparison of Real and Simulated Galaxies
摘要：
在星系的形态结构中编码的是与它们的形成和演化历史有关的线索。星系形态统计学的最新进展包括密集度（C）、不对称度（A）和团块度（S）的复杂测量。在这项研究中，这三个参数（CAS）已被应用到一套模拟星系，并与从附近星系的样本推断的观测结果进行比较。模拟涵盖了一系列晚型系统，质量在~ 1 e10 Msun ~ 1 e12 Msun之间，恒星形成密度阈值在0.1 cm^-3 ~ 100 cm^-3之间。我们发现，模拟的星系具有可比的浓度，以他们的真实同行。然而，CAS分析的结果显示，模拟的星系通常更不对称，并且团块值的范围超出了观察到的范围。三个CAS参数和颜色（B-V）之间获得了很强的相关性，与观测到的星系一致。此外，模拟星系的CAS参数和哈勃类型之间有很强的联系，大部分与它们的真实对应物一致。
英文摘要：
Encoded within the morphological structure of galaxies are clues related to their formation and evolutionary history. Recent advances pertaining to the statistics of galaxy morphology include sophisticated measures of concentration (C), asymmetry (A), and clumpiness (S). In this study, these three parameters (CAS) have been applied to a suite of simulated galaxies and compared with observational results inferred from a sample of nearby galaxies. The simulations span a range of late-type systems, with masses between ~1e10 Msun and ~1e12 Msun, and employ star formation density thresholds between 0.1 cm^-3 and 100 cm^-3. We have found that the simulated galaxies possess comparable concentrations to their real counterparts. However, the results of the CAS analysis revealed that the simulated galaxies are generally more asymmetric, and that the range of clumpiness values extends beyond the range of those observed. Strong correlations were obtained between the three CAS parameters and colour (B-V), consistent with observed galaxies. Furthermore, the simulated galaxies possess strong links between their CAS parameters and Hubble type, mostly in-line with their real counterparts.
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