论文标题
S0星系中的酒吧恢复活力？
Bar rejuvenation in S0 galaxies?
论文作者
论文摘要
基于使用SDSS图像的多频段，多组分2D分解的颜色测量值和螺旋星系，我们发现与螺旋星系相比，S0星系中的条更蓝。我们样本中的大多数S0都有出色的质量$ \ sim l _ {*} $ galaxies。环境可能发挥了重要作用，因为大多数具有蓝色棒的S0都在中间密度的环境中。在中等密度环境中经常发生的较小合并和潮汐相互作用的可能性可能导致棒形成和/或在S0星系的禁止区域中形成恒星形成。与螺旋星系相比，基础盘显示了通常的行为在S0中是红色的，而S0和螺旋星系的凸起则是红色和旧的。 S0星系中蓝色条的发现是一个令人困惑的问题，在数值和理论研究上提出了一个有趣的问题，其中大多数都表明棒是长期存在的结构，具有旧的恒星种群。
Based on the colour measurements from a multi-band, multi-component 2D decomposition's of S0 and spiral galaxies using SDSS images, we found that bars are bluer in S0 galaxies compared to the spiral galaxies. Most of the S0s in our sample have stellar masses $\sim L_{*}$ galaxies. The environment might have played an important role as most of the S0s with bluer bars are in the intermediate-density environment. The possibility of minor mergers and tidal interactions which occurs frequently in the intermediate-density environment might have caused either a bar to form and/or induce star formation in the barred region of S0 galaxies. The underlying discs show the usual behaviour being redder in S0s compared to spiral galaxies while the bulges are red and old for both S0 and spiral galaxies. The finding of bluer bars in S0 galaxies is a puzzling issue and poses an interesting question at numerical and theoretical studies most of which shows that the bars are long-lived structures with old stellar populations.
