论文标题
希克森紧凑型组的星系光度功能的$ -12 $ mag蘸酱
The $-12$ mag dip in the galaxy luminosity function of Hickson Compact Groups
论文作者
论文摘要
我们使用Subaru Hyper Soprime-CAM的图像数据介绍了四个希克森紧凑型组的星系光度函数（LFS）。在所有LFS的微弱端以$ m_g \ sim-12 $中的微弱端出现了一个明显的倾角。在星系簇昏迷和半人马座的LFS中观察到了类似的倾角。但是，处女座，九头蛇和田间的LFS具有平坦的斜率，没有凹陷。由于紧凑型组的星系中星系之间的相对速度低于集群，因此在紧凑型组中，星系 - 半胶质相互作用的效果将更加重要。紧凑型组的$ M_G \ SIM-12 $浸入可能意味着频繁的星系 - 半轴相互作用会影响星系的演变，而LF中的倾角可能成为不同星系群体之间的边界。
We present the galaxy luminosity functions (LFs) of four Hickson Compact Groups using image data from the Subaru Hyper Suprime-Cam. A distinct dip appeared in the faint-ends of all the LFs at $M_g\sim-12$. A similar dip was observed in the LFs of the galaxy clusters Coma and Centaurus. However, LFs in the Virgo, Hydra, and the field had flatter slopes and no dips. As the relative velocities among galaxies are lower in compact groups than in clusters, the effect of galaxy-galaxy interactions would be more significant in compact groups. The $M_g\sim-12$ dip of compact groups may imply that frequent galaxy-galaxy interactions would affect the evolution of galaxies, and the dip in LF could become a boundary between different galaxy populations.
