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arXiv 2507.06339astro-ph.GA
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复杂星系并合体II Zw 096的高分辨率光学IFU光谱研究

High-Resolution Optical IFU Spectroscopy of the Complex Galaxy Merger II Zw 096

C. Riesco, E. Treister, G. Venturi, F. Bauer, G. Privon, C. Finlez, S. Zamora, D. Tubin, Y. Song, I. del Moral-Castro, C. Ricci, C. Ramos, N. Levenson, V. U, A.… 展开作者

C. Riesco, E. Treister, G. Venturi, F. Bauer, G. Privon, C. Finlez, S. Zamora, D. Tubin, Y. Song, I. del Moral-Castro, C. Ricci, C. Ramos, N. Levenson, V. U, A. Medling, S. Aalto, G. D'Ago, V. Olivares, L. Barcos-Muñoz, F. Ricci, G. Olander, F. Muller-Sanchez, P. Tissera

AI总结:

本研究利用VLT/MUSE高分辨率光谱观测,分析并合星系II Zw 096,识别多个星系并发现D1区域存在高度遮蔽的AGN,为星系演化提供新见解。

摘要:

发光和超发光红外星系((U)LIRGs)对于研究反馈机制至关重要,这源于强烈恒星形成(SF)活动与活动星系核(AGN)的结合,特别是在复杂星系相互作用的背景下。我们利用甚大望远镜(VLT)上的多单元光谱探测仪(MUSE),结合高分辨率窄视场模式(NFM)和大视场宽视场模式(WFM)的观测,对II Zw 096并合系统进行了详细分析。通过拟合原子发射线和光学连续谱,我们描绘了该系统气体的形态、运动学和电离辐射。我们在II Zw 096中识别出三个或更多不同的星系,揭示了与坍缩的小星系群一致的旋转模式和复杂相互作用。运动学和电离结构表明高恒星形成率和激波驱动过程,这与所提出的情景相符。聚焦于贡献该系统红外辐射40-70%的D1致密区域,并结合档案多波段观测信息,我们发现强有力证据表明存在一个高度遮蔽的AGN为其供能。我们对II Zw 096的内部结构、相互作用和并合状态的分析,为这个动态且高度混乱系统中的星系演化过程提供了新颖见解。

英文摘要:

Luminous and Ultra-luminous IR galaxies ((U)LIRGs) are critical for investigating feedback mechanisms due to a combination of intense star formation (SF) episodes and active galactic nuclei (AGN), particularly in the context of complex galaxy interactions. We conduct a detailed analysis of the II ZW 096 merging system using the Multi-Unit Spectroscopic Explorer (MUSE) on the Very Large Telescope (VLT), combining high-resolution Narrow Field Mode (NFM) and large-area Wide Field Mode (WFM) observations. We mapped the morphology, kinematics, and ionizing radiation of the system's gas by fitting atomic emission lines and the optical continuum. We identify three or more distinct galaxies within II ZW 096, revealing rotational patterns and complex interactions consistent with a collapsing small galaxy group. The kinematics and ionization structures suggest high star formation rates and shock-driven processes, which align with this proposed scenario. Focusing on the D1 compact region, which contributes 40-70% of the system's IR emission, and combining information from archival multi-wavelength observations, we find strong evidence of a heavily obscured AGN powering it. Our analysis of the internal structure, interactions, and merger state of II ZW 096 offers novel insights into the galaxy evolution processes in this dynamic and highly chaotic system

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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