论文标题
总数与可见质量的比率对SDSS漫画星系的可观察特性的比率
Dependence of the ratio of total to visible mass on observable properties of SDSS MaNGA galaxies
论文作者
论文摘要
使用SDSS漫画DR15的光谱观察结果，我们研究了总质量与可见质量与可见质量的比率与表征星系在本调查中表征星系的演化和环境的各种参数之间的关系。用跨星系表面的H-Alpha发射线的相对速度测量旋转曲线，我们估计每个星系的总质量。我们开发了一个统计模型，以描述总数与可见质量的比率观察到的分布，从中我们从中提取了Galaxy的最可能的质量比率值。我们介绍了总数与可见质量的比率与描述银河进化的几个特征，例如光度，气相金属性，与最近的邻居的距离以及在颜色数字图上的位置。我们发现，具有低金属性的微弱星系，通常在蓝云中，其总比率最高。那些表现出总比率第二高的星系是最明亮的，具有高金属性，通常是红色序列或绿谷的成员。 AGN活性可能既可能是淬火机制，也可能是这些大型星系中质量比较高的反馈。最后，我们引入了一个参数化，该参数基于其光度法和光度，预测星系的总比率与可见质量的比率。
Using spectroscopic observations from the SDSS MaNGA DR15, we study the relationships between the ratio of total to visible mass and various parameters characterizing the evolution and environment of the galaxies in this survey. Measuring the rotation curve with the relative velocities of the H-alpha emission line across the galaxy's surface, we estimate each galaxy's total mass. We develop a statistical model to describe the observed distribution in the ratio of total to visible mass, from which we extract a galaxy's most probable value for this mass ratio. We present the relationships between the ratio of total to visible mass and several characteristics describing galactic evolution, such as luminosity, gas-phase metallicity, distance to the nearest neighbor, and position on the color-magnitude diagram. We find that faint galaxies with low metallicities, typically in the blue cloud, have the highest ratios of total to visible mass. Those galaxies that exhibit the second highest ratios of total to visible mass are the brightest with high metallicities, typically members of the red sequence or green valley. AGN activity is likely both the quenching mechanism and the feedback that drives the mass ratio higher in these massive galaxies. Finally, we introduce a parametrization that predicts a galaxy's ratio of total to visible mass based on its photometry and luminosity.
