GN-z11: The environment of an AGN at $z=$10.603
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arXiv
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2023
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| author | Scholtz, Jan Witten, Callum Laporte, Nicolas Ubler, Hannah Perna, Michele Maiolino, Roberto Arribas, Santiago Baker, William Bennett, Jake D'Eugenio, Francesco Tacchella, Sandro Witstok, Joris Bunker, Andrew Carniani, Stefano Charlot, Stephane Cresci, Giovanni Curtis-Lake, Emma Eisenstein, Daniel Kumari, Nimisha Robertson, Brant Del Pino, Bruno Rodriguez Simmonds, Charlotte Smit, Renske Venturi, Giacomo Williams, Christina Willmer, Christopher |
| author_facet | Scholtz, Jan Witten, Callum Laporte, Nicolas Ubler, Hannah Perna, Michele Maiolino, Roberto Arribas, Santiago Baker, William Bennett, Jake D'Eugenio, Francesco Tacchella, Sandro Witstok, Joris Bunker, Andrew Carniani, Stefano Charlot, Stephane Cresci, Giovanni Curtis-Lake, Emma Eisenstein, Daniel Kumari, Nimisha Robertson, Brant Del Pino, Bruno Rodriguez Simmonds, Charlotte Smit, Renske Venturi, Giacomo Williams, Christina Willmer, Christopher |
| contents | Recent observations with the \textit{James Webb} Space Telescope (JWST) have further refined the spectroscopic redshift of GN-z11, one of the most distant galaxies identified with the \textit{Hubble} Space Telescope (HST) at $z=10.603$. The presence of extremely dense gas ($>10^{10}$ cm$^{-3}$), the detection of high-ionisation lines and of CII*1335 emission, as well as the presence of an ionisation cone, indicate that GN-z11 also hosts an Active Galactic Nucleus (AGN). Further photometric and spectroscopic follow-up demonstrates that it lies in a large-scale, overdense structure with possible signatures of Population III (PopIII) stars in its halo. Surprisingly, Ly$α$ has also been detected despite the expected largely neutral inter-galactic medium at such a redshift. We exploit recent JWST/NIRSpec IFU observations to demonstrate that the Ly$α$ emission in GN-z11 is part of an extended halo with a minimum size of 0.8--3.2 kpc, depending on the definition used to derive the halo size. The surface brightness of the Ly$α$ halo around GN-z11 appears consistent with Ly$α$ halos observed around $z\sim6$ quasars. At the wavelength of Ly$α$ at $z\sim$10.6, we identify three other emission line candidates within the IFU Field-of-View with no UV rest-frame counterpart visible in deep images from the JWST/NIRCam. If confirmed, this could be the first evidence that the local region of GN-z11 represents a candidate protocluster core, forming just 400 Myr after the Big Bang. We give a first estimate of the dark matter halo mass of this structure ($M_h$=2.96$^{+0.44}_{-0.39} \times$10$^{10}$ M$_{\odot}$), consistent with a Coma-like cluster progenitor. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2306_09142 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | GN-z11: The environment of an AGN at $z=$10.603 Scholtz, Jan Witten, Callum Laporte, Nicolas Ubler, Hannah Perna, Michele Maiolino, Roberto Arribas, Santiago Baker, William Bennett, Jake D'Eugenio, Francesco Tacchella, Sandro Witstok, Joris Bunker, Andrew Carniani, Stefano Charlot, Stephane Cresci, Giovanni Curtis-Lake, Emma Eisenstein, Daniel Kumari, Nimisha Robertson, Brant Del Pino, Bruno Rodriguez Simmonds, Charlotte Smit, Renske Venturi, Giacomo Williams, Christina Willmer, Christopher Astrophysics of Galaxies Recent observations with the \textit{James Webb} Space Telescope (JWST) have further refined the spectroscopic redshift of GN-z11, one of the most distant galaxies identified with the \textit{Hubble} Space Telescope (HST) at $z=10.603$. The presence of extremely dense gas ($>10^{10}$ cm$^{-3}$), the detection of high-ionisation lines and of CII*1335 emission, as well as the presence of an ionisation cone, indicate that GN-z11 also hosts an Active Galactic Nucleus (AGN). Further photometric and spectroscopic follow-up demonstrates that it lies in a large-scale, overdense structure with possible signatures of Population III (PopIII) stars in its halo. Surprisingly, Ly$α$ has also been detected despite the expected largely neutral inter-galactic medium at such a redshift. We exploit recent JWST/NIRSpec IFU observations to demonstrate that the Ly$α$ emission in GN-z11 is part of an extended halo with a minimum size of 0.8--3.2 kpc, depending on the definition used to derive the halo size. The surface brightness of the Ly$α$ halo around GN-z11 appears consistent with Ly$α$ halos observed around $z\sim6$ quasars. At the wavelength of Ly$α$ at $z\sim$10.6, we identify three other emission line candidates within the IFU Field-of-View with no UV rest-frame counterpart visible in deep images from the JWST/NIRCam. If confirmed, this could be the first evidence that the local region of GN-z11 represents a candidate protocluster core, forming just 400 Myr after the Big Bang. We give a first estimate of the dark matter halo mass of this structure ($M_h$=2.96$^{+0.44}_{-0.39} \times$10$^{10}$ M$_{\odot}$), consistent with a Coma-like cluster progenitor. |
| title | GN-z11: The environment of an AGN at $z=$10.603 |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2306.09142 |