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arXiv 2602.10682astro-ph.GA
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JWST光谱与' runaway超大质量黑洞'的边缘星系形成场景一致

JWST spectra are consistent with the edge-on star-forming galaxy scenario for the "runaway supermassive black hole"

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);Universidad Nacional Autónoma de México(墨西哥国立自治大学);Institute of Space Sciences (ICE, CSIC)(空间科学研究所)

Jorge Sanchez Almeida, Ignacio Trujillo, Sebastian F. Sanchez, Mireia Montes

AI总结:

JWST光谱支持线性结构为边缘星系形成场景,而非超大质量黑洞产生的bow shock。

摘要:

van Dokkum等(2023)报告的线性结构被提出为由 runaway超大质量黑洞产生的巨大恒星尾迹或无核边缘星系。新的JWST/NIRSpec IFU观测瞄准结构末端,其中超大质量黑洞会产生 bow shock,而正常星系会拥有HII区域。使用标准BPT图([OIII]5007/Hb vs [NII]6583/Ha和[OIII]5007/Hb vs [OII]6716,6731/Ha),我们发现末端的线比落在低金属licity低消光HII区域的定位。此区域不重叠于合并星系中shock的典型定位。因此,这些结果支持线性结构为星系形成场景的解释,明亮的结代表其一个HII区域。

英文摘要:

The linear structure reported by van Dokkum et al. (2023) has been proposed as either a massive stellar wake produced by a runaway supermassive black hole (SMBH) or a bulgeless edge-on galaxy. New JWST/NIRSpec IFU observations target the tip of the structure, where a SMBH would produce a bow shock, whereas a normal galaxy would host an HII region. Using standard BPT diagrams ([OIII]5007/Hb vs [NII]6583/Ha and [OIII]5007/Hb vs [OII]6716,6731/Ha), we find that the line ratios at the tip fall on the locus of low-metallicity low-extinction HII regions. This region does not overlap with loci typical of shocks in merging galaxies. Thus, these results are consistent with the interpretation that the linear structure is a star-forming galaxy, with the bright knot representing one of its HII regions.

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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