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arXiv 2603.29652astro-ph.GAastro-ph.CO
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对三个z>6 JWST AGN宿主星系和AGN性质的限制:基于NOEMA观测

Constraints on the host galaxy and AGN properties of three z > 6 JWST AGN from NOEMA observations

Max-Planck-Institut für extraterrestrische Physik(马克斯·普朗克地外物理研究所);Universidad de Concepción(康塞普西翁大学);Millennium Nucleus for Galaxies(星系千年核);Kavli Institute for Cosmology, University of Cambridge(剑桥大学卡弗里宇宙学研究所);Cavendish Laboratory – Astrophysics Group, University of Cambridge(剑桥大学卡文迪许实验室天体物理学组);Cosmic Dawn Center (DAWN)(宇宙黎明中心);DTU-Space, Technical University of Denmark(丹麦技术大学2DTU空间);INAF–OAA, Osservatorio Astrofisico di Arcetri(意大利国家天体物理研究所阿切尔蒂天文台)
Giovanni Mazzolari, Hannah Übler, Rodrigo Herrera Camus, Ric Davies, Linda Tacconi, Dieter Lutz, Natascha Förster Schreiber, Francesco D'Eugenio, Minju Lee, Cap… 展开作者

Giovanni Mazzolari, Hannah Übler, Rodrigo Herrera Camus, Ric Davies, Linda Tacconi, Dieter Lutz, Natascha Förster Schreiber, Francesco D'Eugenio, Minju Lee, Capucine Barfety, Elena Bertola, Andrew Bunker, Andreas Burkert, Jianhang Chen, Giovanni Cresci, Frank Eisenhauer, Juan Manuel Espejo Salcedo, Simon Flesch, Reinhard Genzel, Xihan Ji, Lilian Lee, Daizhong Liu, Cosimo Marconcini, Roberto Maiolino, Thorsten Naab, Amit Nestor Shachar, Meghana Pannikkote, Eleonora Parlanti, Stavros Pastras, Michele Perna, Claudia Pulsoni, Bruno Rodriguez del Pino, Eckhard Sturm, Taro Shimizu, Giulia Tozzi

AI总结:

研究通过NOEMA观测三个z>6 JWST发现的AGN,发现其[CII]发射线和尘埃连续体未显著检测到,推导出[CII]光度上限,并探讨其缺乏[CII]的可能原因,同时分析宿主星系质量和黑洞质量比,揭示高红移AGN的物理特性。

摘要:

我们利用深NOEMA观测对三个z>6 JWST发现的AGN的[CII]158μm发射线进行了观测。其中两个具有典型的Little Red Dots (LRDs)特征,而第三个是蓝色、扩展的I型AGN。我们未在任何目标中显著检测到[CII]发射线或尘埃连续体,即使进行了堆叠。所得到的[CII]光度上限$\log (L_{[CII]}/L_{\odot})<7.77-8.1$,低于[CII]-SFR关系预期值约2σ,并探讨了缺乏[CII]的不同场景。我们得到了气体质量的上限$\log (M_{gas}/M_{\odot})<9.26-9.59$,假设金属licity依赖的尘埃到气体比率为$\log( M_{dust}/M_{\odot})<5.68-6.55$。利用连续体非检测(rms$\sim 16-25 ~μJy$)和JWST/MIRI约束,我们进行了修订的SED分解,得出恒星质量比之前报告低约2个数量级,暗示$0.03\lesssim M_{BH}/M_{*}\lesssim0.7$。对于两个LRDs,其SED在余弦紫外波段由恒星发射良好再现,而上升的余弦光学斜率,向近红外变平,与部分被极化方向遮蔽的I型AGN发射一致,与宽线Balmer减幅推导的消光一致。这种分解表明,相对标准的AGN配置可以再现两个LRDs的SED,而无需引入更奇特的场景。最后,我们研究了三个源在$IRX-β_{UV}$平面中的位置,发现它们位于一个参数空间中,其中星系通常具有斑驳的尘埃分布。我们的分析强调了毫米波约束对高红移AGN不同物理特性的表征的重要性。

英文摘要:

We targeted with deep NOEMA observations the [CII]158$μ$m emission of three JWST-discovered AGN at z>6. Two of them have the typical features of Little Red Dots (LRDs), while the third one is a blue, extended, Type I AGN. We do not significantly detect [CII] emission or dust continuum in any of the targets, even after stacking. The resulting [CII] luminosity upper limits, $\log (L_{[CII]}/L_{\odot})<7.77-8.1$, lie $\sim2σ$ below the values expected from the [CII]-SFR relation, and we explore different scenarios to explain the lack of [CII]. We obtained upper limits on the gas masses of $\log (M_{gas}/M_{\odot})<9.26-9.59$ corresponding to $\log( M_{dust}/M_{\odot})<5.68-6.55$ assuming a metallicity dependent dust to gas ratio. Using the continuum non-detections (rms $\sim 16-25 ~μJy$) together with JWST/MIRI constraints, we performed a revised SED-fitting decomposition, resulting in stellar masses up to $\sim 2$ dex lower than previously reported, and implying $0.03\lesssim M_{BH}/M_{*}\lesssim0.7$. For the two LRDs, the SED is well reproduced by stellar emission in the rest-frame UV, while the rising rest-frame optical slope, flattening toward the near-infrared, is consistent with emission from a Type I AGN partially obscured along the polar direction with $E(B-V)_{\rm polar}\simeq 1$, in agreement with attenuation derived from the broad lines Balmer decrement. This decomposition demonstrates that a relatively standard AGN configuration can reproduce the SEDs of the two LRDs, without invoking more exotic scenarios. Finally, we investigate the positions of the three sources in the $IRX-β_{UV}$ plane, finding that they lie in a parameter space where galaxies are typically characterized by patchy dust distributions. Our analysis highlights the importance of millimeter constraints to characterize the different physical properties of high-z AGN.

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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