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arXiv 2401.04590astro-ph.GA
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z \sim 6 类星体宿主星系中多样化的分子气体激发

Diverse molecular gas excitations in quasar host galaxies at z \sim 6

Jianan Li, Ran Wang, Antonio Pensabene, Fabian Walter, Bram P. Venemans, Roberto Decarli, Eduardo Bañados, Pierre Cox, Roberto Neri, Alain Omont, Zheng Cai, Yan… 展开作者

Jianan Li, Ran Wang, Antonio Pensabene, Fabian Walter, Bram P. Venemans, Roberto Decarli, Eduardo Bañados, Pierre Cox, Roberto Neri, Alain Omont, Zheng Cai, Yana Khusanova, Fuxiang Xu, Dominik Riechers, Jeff wagg, Yali Shao, Yuanqi Liu, Karl M. Menten, Qiong Li, Xiaohui Fan

AI总结:

本研究利用NOEMA观测z ~ 6类星体的CO和H2O发射线,发现两系统分别具有最高和最低的CO激发,揭示了早期类星体宿主气体条件和激发机制的复杂性。

摘要:

我们展示了使用NOrthern Extended Millimetre Array(NOEMA)对两个z \sim 6类星体(即z = 5.78的P215-16和z = 6.18的J1429+5447)的CO和$\rm H_{2}O$发射线及潜在尘埃连续谱的观测结果。值得注意的是,在所有已发表的z \sim 6类星体CO SLEDs中,这两个系统分别显示出最高和最低的CO激发能级。我们对P215-16的CO SLED进行辐射传输建模表明,被AGN加热的分子气体可能是高CO激发的合理起源。对于J1429+5447,我们获得了z \gtrsim 6射电噪类星体的首个采样充分的CO SLED(涵盖2-1到10-9跃迁)。对CO SLED的分析表明,单一光解离区(PDR)成分可以解释射电噪类星体J1429+5447中的CO激发。本工作突出了CO SLED在揭示这些最高红移年轻类星体-星暴系统ISM性质方面的效用。CO SLEDs的多样性揭示了它们早期演化阶段气体条件和激发机制的复杂性。

英文摘要:

We present observations using the NOrthern Extended Millimetre Array (NOEMA) of CO and $\rm H_{2}O$ emission lines, and the underlying dust continuum in two quasars at $z \sim 6$, i.e., P215-16 at $z$ = 5.78 and J1429+5447 at $z$ = 6.18. Notably, among all published CO SLEDs of quasars at $z \sim 6$, the two systems reveal the highest and the lowest CO level of excitation, respectively. Our radiative transfer modeling of the CO SLED of P215-16 suggests that the molecular gas heated by AGN could be a plausible origin for the high CO excitation. For J1429+5447, we obtain the first well-sampled CO SLED (from transitions from 2-1 to 10-9) of a radio-loud quasar at $z\gtrsim 6$. Analysis of the CO SLED suggests that a single photo-dissociation region (PDR) component could explain the CO excitation in the radio-loud quasar J1429+5447. This work highlights the utility of the CO SLED in uncovering the ISM properties in these young quasar-starburst systems at the highest redshift. The diversity of the CO SLEDs reveals the complexities in gas conditions and excitation mechanisms at their early evolutionary stage.

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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