论文标题
附近星系中反向旋转恒星磁盘的不同编队场景
Different Formation Scenarios of Counter-rotating Stellar Disks in Nearby Galaxies
论文作者
论文摘要
使用来自Apache Point观测值（漫画）调查的附近星系映射的积分场单元（IFU）数据，我们选择了101个带有反向旋转恒星磁盘的星系样本和定期旋转的电离气盘。我们根据其恒星速度场的特征将101个星系分为四种类型。这四种类型的相对部分和恒星人口年龄径向梯度在蓝云（BC），绿谷（GV）和红色序列（RS）种群中不同。我们建议针对反向旋转恒星磁盘的不同形成场景，而反向旋转恒星磁盘形成的关键因素包括：（1）祖先中既有的气体的丰度，（2）角动量消耗的效率。
Using the integral field unit (IFU) data from Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, we select a sample of 101 galaxies with counter-rotating stellar disks and regularly-rotating ionized gas disk. We classify the 101 galaxies into four types based on the features of their stellar velocity fields. The relative fractions and stellar population age radial gradients of the four types are different in blue cloud (BC), green valley (GV) and red sequence (RS) populations. We suggest different formation scenarios for the counter-rotating stellar disks, and the key factors in the formation of counter-rotating stellar disks include: (1) the abundance of pre-existing gas in progenitor, (2) the efficiency in angular momentum consumption.
