GLIMPSED: Direct evidence for a fast AGN-driven outflow from a z=6.64 Little Red Dot host galaxy
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| Autores principales: | , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
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2026
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| author | Korber, Damien Marques-Chaves, Rui Schaerer, Daniel Brammer, Gabriel Aravindan, Archana Basu, Arghyadeep Fei, Qinyue Giovinazzo, Emma Kokorev, Vasily Saldana-Lopez, Alberto Trebitsch, Maxime Atek, Hakim Chisholm, John Endsley, Ryan Fujimoto, Seiji Furtak, Lukas Pan, Richard Naidu, Rohan P. |
| author_facet | Korber, Damien Marques-Chaves, Rui Schaerer, Daniel Brammer, Gabriel Aravindan, Archana Basu, Arghyadeep Fei, Qinyue Giovinazzo, Emma Kokorev, Vasily Saldana-Lopez, Alberto Trebitsch, Maxime Atek, Hakim Chisholm, John Endsley, Ryan Fujimoto, Seiji Furtak, Lukas Pan, Richard Naidu, Rohan P. |
| contents | We report the discovery of GLIMPSED-329380, a z=6.64 galaxy behind Abell S1063, which shows signs of an extreme ionised outflow driven by an active galactic nucleus (AGN). The deep JWST/NIRSpec medium grating observations show spatially resolved structures of a host galaxy containing the very fast outflow and an AGN, which we analyse separately. The outflow, mainly traced by broad [O III]λ5008 and Hα emissions in the host, reaches a full-width half-maximum velocity of ~5500km/s, velocities only observed in AGN-dominated systems. From the Balmer decrement, we observe that while the narrow emission lines show no dust attenuation, the outflowing gas is dusty. We use emission lines diagnostics to infer gas abundances within the host galaxy. The oxygen abundance is 12+log(O/H) ~ 7.95 (~18% solar) and the host is slightly nitrogen-enriched with log(N/O) ~ -0.75. Despite its extreme velocity, the mass loading factor (<0.1) and the kinematic energy of the outflow (~10^43 erg/s) suggest limited impact on star formation. The AGN component shows many similarities with little red dots (LRDs): a characteristic "V-shape", exponential profile in hydrogen lines, numerous detection of forbidden [Fe II] lines, a Balmer break, and a broad absorption feature at ~4550 Å. This detection of a fast outflow in an LRD, rare in surveys dominated by low-resolution (e.g. PRISM) spectra, provides direct evidence of AGN activity in these systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_08687 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | GLIMPSED: Direct evidence for a fast AGN-driven outflow from a z=6.64 Little Red Dot host galaxy Korber, Damien Marques-Chaves, Rui Schaerer, Daniel Brammer, Gabriel Aravindan, Archana Basu, Arghyadeep Fei, Qinyue Giovinazzo, Emma Kokorev, Vasily Saldana-Lopez, Alberto Trebitsch, Maxime Atek, Hakim Chisholm, John Endsley, Ryan Fujimoto, Seiji Furtak, Lukas Pan, Richard Naidu, Rohan P. Astrophysics of Galaxies We report the discovery of GLIMPSED-329380, a z=6.64 galaxy behind Abell S1063, which shows signs of an extreme ionised outflow driven by an active galactic nucleus (AGN). The deep JWST/NIRSpec medium grating observations show spatially resolved structures of a host galaxy containing the very fast outflow and an AGN, which we analyse separately. The outflow, mainly traced by broad [O III]λ5008 and Hα emissions in the host, reaches a full-width half-maximum velocity of ~5500km/s, velocities only observed in AGN-dominated systems. From the Balmer decrement, we observe that while the narrow emission lines show no dust attenuation, the outflowing gas is dusty. We use emission lines diagnostics to infer gas abundances within the host galaxy. The oxygen abundance is 12+log(O/H) ~ 7.95 (~18% solar) and the host is slightly nitrogen-enriched with log(N/O) ~ -0.75. Despite its extreme velocity, the mass loading factor (<0.1) and the kinematic energy of the outflow (~10^43 erg/s) suggest limited impact on star formation. The AGN component shows many similarities with little red dots (LRDs): a characteristic "V-shape", exponential profile in hydrogen lines, numerous detection of forbidden [Fe II] lines, a Balmer break, and a broad absorption feature at ~4550 Å. This detection of a fast outflow in an LRD, rare in surveys dominated by low-resolution (e.g. PRISM) spectra, provides direct evidence of AGN activity in these systems. |
| title | GLIMPSED: Direct evidence for a fast AGN-driven outflow from a z=6.64 Little Red Dot host galaxy |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2604.08687 |