更多关于棒材淬火的见解

K. George, Prajwel Joseph, C. Mondal, S. Subramanian, A. Subramaniam, K. T. Paul
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引用次数: 7

摘要

棒状星系中心区域恒星形成过程的基本性质是由于恒星棒状星系的作用而被熄灭的。我们利用光学、紫外、红外、CO和HI成像资料对四个棒状星系进行了多波长研究,以更好地了解棒状星系的恒星形成过程和恒星和气体分布。我们发现,对于三个星系,在核区或中心亚千秒差距区和棒状区(棒状区)的末端之间的区域缺乏中性氢和分子氢。虽然检测到的中性氢是非常微不足道的,但我们注意到分子氢在所有四个星系的核区或中心亚千秒差距区域大量存在。四个星系中有三个的柱状共旋转半径也没有最近形成的恒星。其中一个星系沿条形结构显示出明显的氢分子,这可能意味着这些气体仍在恒星条形结构的作用下被输送到星系中心。沿着这个星系的棒状共旋转半径也有重要的恒星形成。本文的研究支持这样一种假设,即由于恒星棒的作用,气体再分配清除了棒区进一步形成恒星的燃料,并最终导致棒区恒星形成的淬火。
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More insights into bar quenching
The underlying nature of the process of star formation quenching in the central regions of barred disc galaxies that is due to the action of stellar bar is not fully understood. We present a multi-wavelength study of four barred galaxies using the archival data from optical, ultraviolet, infrared, CO, and HI imaging data on star formation progression and stellar and gas distribution to better understand the process of bar quenching. We found that for three galaxies, the region between the nuclear or central sub-kiloparsec region and the end of the bar (bar region) is devoid of neutral and molecular hydrogen. While the detected neutral hydrogen is very negligible, we note that molecular hydrogen is present abundantly in the nuclear or central sub-kiloparsec regions of all four galaxies. The bar co-rotation radius is also devoid of recent star formation for three out of four galaxies. One galaxy shows significant molecular hydrogen along the bar, which might mean that the gas is still being funnelled to the centre by the action of the stellar bar. Significant star formation is also present along the bar co-rotation radius of this galaxy. The study presented here supports a scenario in which gas redistribution as a result of the action of stellar bar clears the bar region of fuel for further star formation and eventually leads to star formation quenching in the bar region.
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