arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2604.08239astro-ph.GA
收藏

扩展的冠状线发射与可能双AGN的新线索:合并体J1356+1026

Extended coronal line emission and new clues to a possible dual AGN in the merger J1356+1026

Instituto de Astrofísica de Canarias(加那利群岛天体物理研究所);Universidad de La Laguna(拉古纳大学);Instituto de Radioastronomía and Astrofísica (IRyA-UNAM)(无线电天文学和天体物理学研究所(墨西哥国立自治大学));INAF – Osservatorio Astrofisico di Arcetri(意大利国家天体物理研究所–阿切特里天文台);INPE(巴西国家空间研究院);CSIC(西班牙高等科学理事会);University of Sheffield(谢菲尔德大学);Centro de Astrobiología (CAB), CSIC-INTA(天体生物学中心(CSIC-INTA))
M. Bianchin, C. Ramos Almeida, O. González-Martín, M. V. Zanchettin, M. Carneiro, M. Pereira-Santaella, C. Tadhunter, G. Speranza, I. García-Bernete, A. Audiber… 展开作者

M. Bianchin, C. Ramos Almeida, O. González-Martín, M. V. Zanchettin, M. Carneiro, M. Pereira-Santaella, C. Tadhunter, G. Speranza, I. García-Bernete, A. Audibert, A. Alonso-Herrero, D. Rigopoulou, A. Labiano, J. A. Acosta-Pulido, S. García-Burillo

AI总结:

研究通过JWST和VLT数据发现J1356S可能拥有AGN,基于冠状线发射和光谱特征,揭示合并体中可能存在双AGN系统。

摘要:

合并的明亮星系是研究极端天体物理现象的理想实验室。本地(z=0.1232)被遮蔽的类星体J1356+1026有两个核,北核和南核(J1356N和J1356S),但尽管多次努力,J1356S尚未被确认为AGN。得益于JWST上的MIRI/MRS仪器的高灵敏度和空间分辨率,我们提出了新的证据,表明J1356S可能确实拥有AGN,其bol量级为43.4±0.6/0.5 erg s^{-1}。这得到了该位置强冠状线发射的检测以及光谱形状不同于J1356N和窄线区(NLR)的光谱形状的支持。借助MIRI/MRS和VLT/SINFONI的空间分辨信息,我们还发现高电离气体,通过冠状线[Ne V]14.3μm和[Si VI]1.963μm追踪,其延伸约13-15.5kpc。这可能是真实延伸的下限,如通过与HST光学成像的比较所建议的。扩展的[Ne V]发射可以由J1356N中的类星体光子电离在相对较低密度环境中解释,范围从J1356N中的n_e≤2000-3800 cm^{-3}和J1356S及NLR中的n_e≤600-1200 cm^{-3},如通过[Ne V]14.3μm和24.3μm线测量得到。

英文摘要:

Merging luminous galaxies are ideal laboratories to study some of the most extreme astrophysical phenomena. The local (z=0.1232) obscured quasar J1356+1026 has two nuclei, North and South (J1356N and J1356S), but despite numerous efforts, J1356S had not yet been confirmed as an AGN. Thanks to the superb sensitivity and spatial resolution of the MIRI/MRS instrument on board the JWST, we present new evidence suggesting that J1356S may indeed host an AGN with log L$_{\rm bol}=43.4\pm^{0.6}_{0.5} erg s^{-1}$. This is supported by the detection of strong coronal line emission at this location and by a spectral shape that differs from that of J1356N and those of the narrow-line region (NLR). Aided by the spatially resolved information of MIRI/MRS and VLT/SINFONI, we also find that the high ionization gas, traced by the coronal lines [Ne V]$14.3~μ$m and [Si VI]$1.963 μ$m, has an extension of ~13-15.5 kpc. This is likely a lower limit of the true extension, as suggested by the comparison with optical imaging from HST. {The extended [Ne V] emission can be accounted for by photoionization from the quasar in J1356N in a relatively low density environment, ranging from $\rm n_e\leq 2000-3800 cm^{-3}$ in J1356N and $\rm n_e\leq 600-1200 cm^{-3}$ in J1356S and the NLR, as measured from the [Ne V]$14.3μ$m and $24.3~μ$m lines.

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。

↑