GA-NIFS: The interplay between feedback and star formation at 3 < z < 9 probed by JWST/NIRSpec IFU

IF 6.1 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Astronomy & Astrophysics Pub Date : 2026-10-08 DOI:10.1051/0004-6361/202661424

L. Ulivi,M. Perna,S. Arribas,B. Rodríguez Del Pino,P. G. Pérez-González,I. Lamperti,C. Marconcini,H. Übler,F. D'Eugenio,T. Böker,A. J. Bunker,S. Carniani,S. Charlot,R Maiolino,P. Alvarez,E. Bertola,G. Cresci,M. Curti,M. Hamed,L. R. Ivey,G. C. Jones,E. Parlanti,R. Pascalau,C. Prieto Jimenez,B. Trefoloni,G. Venturi,S. Zamora

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引用次数: 0

Abstract

The study of starburst- and active galactic nucleus (AGN)-driven feedback is fundamental for understanding the processes that shape galaxy growth, quench star formation, and drive the co-evolution of galaxies and their central black holes. We present a spatially resolved study of six galaxies at 3 < z < 9, including starburst- and AGN-dominated systems, observed with the /NIRSpec Integral Field Unit in low- (R ∼ 100) and high-resolution (R ∼ 2700) mode. Previous analyses of R ∼ 2700 data revealed ionized outflows in all these galaxies. We explored possible links between outflows and stellar population properties to assess the mechanisms driving galaxy evolution at early epochs. We derived stellar masses and star formation histories (SFHs) using the spectral energy distribution fitting code , applied to both single spaxels and spatially integrated spectra, exploring parametric and non-parametric SFHs. We find that unresolved stellar mass measurements are systematically underestimated, with discrepancies increasing towards higher sSFRs (up to ∼ 0.75 dex), consistent with the so-called outshining effect. Combining the spatially resolved stellar population analysis with the outflow properties, we find that the most massive galaxies $(M_⋆>5 M_⊙)$ with strong AGN-driven ionized outflows show evidence of past quenching episodes occurring within the last ∼ 100–300 Myr, mainly in the nuclear regions (r < 3 kpc). In contrast, higher-redshift (z>5) and less massive $(M_⋆<10^ JWST Prospector 10 10 M_⊙)$ starburst galaxies with powerful (starburst-driven) outflows appear to have experienced continuous growth, with no clear sign of quenching. Massive galaxies with weaker outflows do not show evidence of quenching in their history. One massive AGN host (GS20936) shows evidence of a recent (10--30 Myr) rejuvenation phase, likely fuelled by a recent major merger. This interpretation is supported by TNG300 cosmological simulations, which indicate that ∼ 5% of galaxies with M_⋆ > 5 , _⊙ undergo similar rejuvenation events driven by merging at z∼ 3. These results suggest that (AGN-driven) outflows can already play a key role in shaping the SFHs of massive galaxies at early cosmic epochs, while also highlighting the importance of spatially resolved analyses for accurately reconstructing their evolutionary pathways. 10^ 10 M

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GA-NIFS: JWST/NIRSpec IFU探测的3 < z < 9反馈与恒星形成之间的相互作用

星暴和活动星系核（AGN）驱动反馈的研究是理解塑造星系生长、熄灭恒星形成和驱动星系及其中心黑洞共同演化过程的基础。我们提出了对3 <； z <； 9的六个星系的空间分辨率研究，包括星暴和agn主导的系统，用/NIRSpec积分场单元在低（R ~ 100）和高分辨率（R ~ 2700）模式下观测到。先前对R ~ 2700数据的分析揭示了所有这些星系的电离流出。我们探索了外流和恒星种群特性之间的可能联系，以评估早期推动星系演化的机制。我们使用光谱能量分布拟合代码推导恒星质量和恒星形成历史（SFHs），应用于单光谱和空间集成光谱，探索参数和非参数SFHs。我们发现，未解决的恒星质量测量结果被系统地低估了，随着sSFRs的增加（高达0.75指数），差异越来越大，这与所谓的发光效应一致。结合空间分辨恒星种群分析和流出特性，我们发现具有强烈agn驱动的电离流出的最大质量星系$(M_ - >5 M_⊙)$显示出过去在最后~ 100-300 Myr内发生的淬火事件的证据，主要发生在核区域（r < 3 kpc）。相比之下，红移较高的星系（z>5）和质量较小的星系（M_ - JWST Prospector 10 10 M_⊙）具有强大的（星爆驱动的）外流，似乎经历了持续的增长，没有明显的熄灭迹象。具有较弱外流的大质量星系在它们的历史中没有显示出淬灭的证据。一个巨大的AGN宿主（GS20936）显示出最近（10- 30兆卢比）复兴阶段的证据，可能是由最近的重大合并推动的。这一解释得到了TNG300宇宙学模拟的支持，该模拟表明，约5%的M_ - - >； 5， _⊙星系经历了类似的由z ~ 3合并驱动的返青事件。这些结果表明，（agn驱动的）外流已经在塑造早期宇宙时期大质量星系的SFHs中发挥了关键作用，同时也强调了空间分辨率分析对精确重建其演化路径的重要性。10^ 10米

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来源期刊

Astronomy & Astrophysics 地学天文-天文与天体物理

CiteScore

10.20

自引率

27.70%

发文量

2105

审稿时长

1-2 weeks

期刊介绍： Astronomy & Astrophysics is an international Journal that publishes papers on all aspects of astronomy and astrophysics (theoretical, observational, and instrumental) independently of the techniques used to obtain the results.