系统不对称：真实和模拟星系中\hi剖面不对称性的比较
Systematically Asymmetric: A comparison of \hi\ profile asymmetries in real and simulated galaxies
摘要：
我们研究不同的措施，星系HI速度剖面的不对称性。我们引入了通道的通道不对称性和速度的平等统计来量化配置文件的不对称性。使用模拟星系的样本，我们研究如何这些和标准的不平衡形态统计依赖于各种观测效果，包括视角和倾角。我们发现，我们新引入的通道通道的不对称性是不太敏感的视角和倾斜比其他形态的影响。将我们的统计数据应用于WHISP HI星系样本，我们还发现，通道的通道不对称性，是一个更好的指标，视觉分类的不对称配置文件。此外，我们发现等式空间的不对称速度可以用来识别具有深中心倾角的剖面，而无需目视检查。
英文摘要：
We examine different measures of asymmetry for galaxy HI velocity profiles. We introduce the channel-by-channel asymmetry and the velocity-of-equality statistics to quantify profile asymmetries. Using a sample of simulated galaxies, we examine how these and the standard lopsidedness morphometric statistic depend on a variety of observational effects including the viewing angle and inclination. We find that our newly introduced channel-by-channel asymmetry is less sensitive to the effects of viewing angle and inclination than other morphometrics. Applying our statistics to the WHISP HI galaxy sample, we also find that the channel-by-channel asymmetry, is a better indicator of visually-classified asymmetric profiles. In addition, we find that the lopsidedness-velocity of equality space can be used to identify profiles with deep central dips without visual inspection.
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