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arXiv 2010.04005astro-ph.GA
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更多关于棒材淬火的见解。四个棒星系的多波长分析

More insights into bar quenching. Multi-wavelength analysis of four barred galaxies

Koshy George, P. Joseph, C. Mondal, S. Subramanian, A. Subramaniam, K. T. Paul

摘要:

由于恒星棒的作用,棒盘星系中心区域恒星形成猝灭过程的基本性质还没有完全了解。我们提出了一个多波长的研究四个酒吧星系使用档案数据从光学,紫外,红外,CO和HI成像数据的恒星形成过程和恒星和气体分布,以更好地了解酒吧淬火的过程。我们发现,对于三个星系,核或中央的亚千秒差距区域和酒吧(酒吧区)的结束之间的区域是缺乏中性和分子氢。虽然检测到的中性氢是非常微不足道的,我们注意到,分子氢是目前丰富的核或中央的所有四个星系的千秒差距区域。棒的共同旋转半径也没有最近的恒星形成的四个星系中的三个。其中一个星系显示出沿棒存在大量的氢分子,这可能意味着气体仍在通过恒星棒的作用向中心汇集。沿着这个星系的棒共同旋转半径也存在重要的恒星形成。这里提出的研究支持的情况下,气体重新分配作为恒星酒吧的行动的结果清除酒吧区域的燃料进一步恒星形成,并最终导致恒星形成淬火酒吧区域。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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