论文标题
NGC 5236的恒星作为螺旋星系中的手臂和手臂宽度的示踪剂
NGC 5236's stars as tracers of arms and arm widths in spiral galaxies
论文作者
论文摘要
通常，识别螺旋星系的螺旋臂并不是一项艰巨的任务。但是，定义主要特征，这些结构的宽度和长度并不是常见的任务。先前的研究使用了不同的示踪剂：星团，群体，h $α$。直到最近，单个恒星被用作螺旋结构的示踪剂。测量螺旋臂宽度的基本方法假设在平均浓度（气体或其他示踪剂）周围具有高斯分布。在这项工作中，我们将NGC 5236的星星用作示踪剂。我们估计了臂和臂间区域的表面恒星密度，以测量手臂的宽度。作为测试案例，该作品的重点是NGC 5236（M83）。我们发现场恒星群体可以追踪NGC 5236的（两个）主螺旋臂。我们发现使用其他示踪剂发现了手臂宽度与半乳突中心半径之间的相关性。手臂宽度的生长斜率与螺旋星系的形态类型相关。我们研究的第二个发现表明，臂的宽度与腐烂半径之间可能存在相关性，结果将在后续纸中呈现。
Generally, identifying the spiral arms of a spiral galaxy is not a hard task. However, defining the main characteristics, width and length of those structure is not a common task. Previous studies have used different tracers: Star clusters, Massers, H$α$. It was until recently that individual stars were used as tracers of spiral structures. The basic method of measuring the width of spiral arms assumes a Gaussian distribution around the mean concentration, either of gas or other tracer. In this work we use NGC 5236's stars as tracers. We estimated the surface stellar density of arms and inter-arm regions to measure the width of the arms. As a test case, this works focused on NGC 5236 (M83). We find that field stellar populations can trace the (two) main spiral arms of NGC 5236. We find a correlation between the arm width and the galactocentric radii, found using other tracers. The slope of the growth of the width of the arm correlates with the morphological types of spiral galaxies. A second finding of our study suggest the possible correlation between the width of the arms and the corrotation radius, result that will be presented in a follow up paper.
