论文标题

叮当 - iv。当地宇宙中的灰尘,高气和金属缩放法律

JINGLE -- IV. Dust, HI gas and metal scaling laws in the local Universe

论文作者

De Looze, I., Lamperti, I., Saintonge, A., Relano, M., Smith, M. W. L., Clark, C. J. R., Wilson, C. D., Decleir, M., Jones, A. P., Kennicutt, R. C., Accurso, G., Brinks, E., Bureau, M., Cigan, P., Clements, D. L., De Vis, P., Fanciullo, L, Gao, Y., Gear, W. K., Ho, L. C., Hwang, H. S., Michalowski, M. J., Lee, J. C., Li, C., Lin, L., Liu, T., Lomaeva, M., Pan, H. -A., Sargent, M., Williams, T., Xiao, T., Zhu, M.

论文摘要

灰尘,高气和金属质量的缩放定律,具有恒星的质量,特定的恒星形成速率和金属性对于我们通过金属和灰尘的富集来理解我们对星系堆积的理解至关重要。在这项工作中,我们分析了灰尘和金属含量如何随特定的气体质量($ m _ {\ text {hi}} $/$/$ m _ {\ star} $在附近的423个星系中的不同样本中而变化。观察到的趋势用一组灰尘和元素进化模型(DEU)(包括恒星粉尘的产生,谷物生长和尘埃破坏)来解释,以在贝叶斯框架内进行严格的搜索,以对多维参数空间进行严格的搜索。 We find that these scaling laws for galaxies with $-1.0\lesssim \log M_{\text{HI}}$/$M_{\star}\lesssim0$ can be reproduced using closed-box models with high fractions (37-89$\%$) of supernova dust surviving a reverse shock, relatively low grain growth efficiencies ($ε$ = 30-40)和长dus寿命(1-2 \,gyr)。这些型号具有当今的尘埃质量,其恒星资源(50-80 \,$ \%$)和谷物增长(20-50 \,$ \%$)的贡献类似。在这些星系的整个生命中,星尘($> $ 90 \,$ \%$)的贡献大于星际介质中种植的灰尘($ <$ <$ 10 $ \%$)。我们的结果为化学演化模型提供了一种替代方法,这些模型需要极低的超新星粉尘生产效率和短谷物生长时间尺度来再现局部缩放定律,并可以帮助解决谷物是否可以在星际介质中有效生长的难题。

Scaling laws of dust, HI gas and metal mass with stellar mass, specific star formation rate and metallicity are crucial to our understanding of the buildup of galaxies through their enrichment with metals and dust. In this work, we analyse how the dust and metal content varies with specific gas mass ($M_{\text{HI}}$/$M_{\star}$) across a diverse sample of 423 nearby galaxies. The observed trends are interpreted with a set of Dust and Element evolUtion modelS (DEUS) - incluidng stellar dust production, grain growth, and dust destruction - within a Bayesian framework to enable a rigorous search of the multi-dimensional parameter space. We find that these scaling laws for galaxies with $-1.0\lesssim \log M_{\text{HI}}$/$M_{\star}\lesssim0$ can be reproduced using closed-box models with high fractions (37-89$\%$) of supernova dust surviving a reverse shock, relatively low grain growth efficiencies ($ε$=30-40), and long dus lifetimes (1-2\,Gyr). The models have present-day dust masses with similar contributions from stellar sources (50-80\,$\%$) and grain growth (20-50\,$\%$). Over the entire lifetime of these galaxies, the contribution from stardust ($>$90\,$\%$) outweighs the fraction of dust grown in the interstellar medium ($<$10$\%$). Our results provide an alternative for the chemical evolution models that require extremely low supernova dust production efficiencies and short grain growth timescales to reproduce local scaling laws, and could help solving the conundrum on whether or not grains can grow efficiently in the interstellar medium.

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