论文标题
在晚期抑制或增强的中心星形成率禁止星系
Suppressed or enhanced central star formation rates in late-type barred galaxies
论文作者
论文摘要
圆盘主导的星系中的条能够驱动旋转半径内的气体流入，从而提高了中央恒星形成速率（SFR）。然而，以前的工作发现，具有中心抑制的SFR的圆盘主导的星系经常容纳棒。在这里，我们研究了在这种情况下抑制中央SFR的可能原因。我们将具有高中央SFR（HC星系）样品的物理特性与具有低中央SFR（LC星系）的圆盘主导的禁止的星系样品的物理特性。我们发现这两个样品平均具有相似的HI含量和类似强度的条。但是我们也发现，HCS比LCS具有更蓝的颜色，并且在酒吧区域以外，它们主持的螺旋臂比LCS比LCS更强大。我们讨论并评估了抑制中央SFR在LC星系中的可能原因，而不是其在HC星系中的增强。
Bars in disc-dominated galaxies are able to drive gas inflow inside the corotation radius, thus enhancing the central star formation rate (SFR). Previous work, however, has found that disc-dominated galaxies with centrally suppressed SFR frequently host a bar. Here we investigate possible causes for the suppression of central SFR in such cases. We compare physical properties of a sample of disc-dominated barred galaxies with high central SFR (HC galaxies) with those of a sample of disc-dominated barred galaxies with low central SFR (LC galaxies). We find that the two samples have on average similar HI content and bars of similar strength. But we also find that the HCs have bluer colors than LCs, and that outside the bar region they host stronger spiral arms than the LCs where closed rings are more often seen. We discuss and evaluate the possible causes for the suppression of the central SFR in the LC galaxies as opposed to its enhancement in the HC galaxies.
