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arXiv 2102.08865astro-ph.GA
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热化是[ CII ]缺陷的贡献者

The Case for Thermalization as a Contributor to the [CII] Deficit

Jessica Sutter, Daniel A. Dale, Karin Sandstrom, J. D. T. Smith, Alberto Bolatto, Mederic Boquien, Daniela Calzetti, Kevin V. Croxall, Ilse De Looze, Maude Gala… 展开作者

Jessica Sutter, Daniel A. Dale, Karin Sandstrom, J. D. T. Smith, Alberto Bolatto, Mederic Boquien, Daniela Calzetti, Kevin V. Croxall, Ilse De Looze, Maude Galametz, Brent A. Groves, George Helou, Rodrigo Herrera-Camus, Leslie K. Hunt, Robert C. Kennicutt, Eric W. Pelligrini, Christine Wilson, Mark G. Wolfire

摘要:

[CII]赤字描述了在具有高恒星形成表面密度的星系中观察到的[CII] 158微米发射与连续红外发射的比率下降,这对整个可观测宇宙的[CII]探测的解释提出了重大挑战。为了进一步解码[CII]缺陷的原因,来自18个本体积星系的[CII]和尘埃连续辐射已经根据其起源的星际介质内的条件进行了分裂。这是使用附近星系的关键见解完成的:一个远红外线调查与赫歇尔(KINGFISH)和超越峰值(BtP)调查和广泛的波长信息,从紫外线到远红外线发射线,可用于这些样本中的恒星形成区域。通过将这些细分的[CII]发射与孤立的红外发射和其他性质进行比较,我们发现HII区域中[CII]线的热化(碰撞去激发)在我们样品中观察到的缺陷中起着重要作用。

英文摘要:

The [CII] deficit, which describes the observed decrease in the ratio of [CII] 158 micron emission to continuum infrared emission in galaxies with high star formation surface densities, places a significant challenge to the interpretation of [CII] detections from across the observable universe. In an attempt to further decode the cause of the [CII] deficit, the [CII] and dust continuum emission from 18 Local Volume galaxies has been split based on conditions within the interstellar medium where it originated. This is completed using the Key Insights in Nearby Galaxies: a Far-Infrared Survey with Herschel (KINGFISH) and Beyond the Peak (BtP) surveys and the wide-range of wavelength information, from UV to far-infrared emission lines, available for a selection of star-forming regions within these samples. By comparing these subdivided [CII] emissions to isolated infrared emission and other properties, we find that the thermalization (collisional de-excitation) of the [CII] line in HII regions plays a significant role in the deficit observed in our sample.

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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