JADES NIRSpec Spectroscopy of GN-z11: Lyman-alpha emission and possible enhanced nitrogen abundance in a z = 10.60 luminous galaxy [PDF]
Astronomy & Astrophysics, 2023 We present JADES JWST/NIRSpec spectroscopy of GN-z11, the most luminous candidate $z>10$ Lyman break galaxy in the GOODS-North field with $M_{UV}=-21.5$.
A. Bunker +61 more
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Art, économie et créativité chez John Maynard Keynes
Revue d économie industrielle, 2021 L’article porte sur la place occupee par la notion de creativite dans l’œuvre et la vie intellectuelles de John Maynard Keynes. Tout d’abord un reexamen du concept de choix rationnel chez Keynes fait apparaitre un point de vue tres critique chez cet ...
R. Arena
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JADES Imaging of GN-z11: Revealing the Morphology and Environment of a Luminous Galaxy 430 Myr after the Big Bang [PDF]
Astrophysical Journal, 2023 We present JWST NIRCam nine-band near-infrared imaging of the luminous z = 10.6 galaxy GN-z11 from the JWST Advanced Deep Extragalactic Survey of the GOODS-N field.
S. Tacchella +47 more
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Nitrogen enhancements 440 Myr after the Big Bang: super-solar N/O, a tidal disruption event or a dense stellar cluster in GN-z11? [PDF]
Monthly notices of the Royal Astronomical Society, 2023 Recent observations of GN-z11 with JWST/NIRSpec revealed numerous oxygen, carbon, nitrogen, and helium emission lines at z = 10.6. Using the measured line fluxes, we derive abundance ratios of individual elements within the interstellar medium (ISM) of
A. Cameron +3 more
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N-enhancement in GN-z11: First evidence for supermassive stars nucleosynthesis in proto-globular cluster-like conditions at high redshift? [PDF]
Astronomy & Astrophysics, 2023 Unusually high N/O abundance ratios were recently reported for a very compact, intensively star-forming object GN-z11 at $z=10.6$ from JWST/NIRSpec observations.
C. Charbonnel +7 more
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JADES. Possible Population III signatures at z=10.6 in the halo of GN-z11 [PDF]
Astronomy & Astrophysics, 2023 Finding the first generation of stars formed out of pristine gas in the early Universe, known as Population III (PopIII) stars, is one of the most important goals of modern astrophysics.
R. Maiolino +33 more
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Rapid Chemical Enrichment by Intermittent Star Formation in GN-z11 [PDF]
Astrophysical Journal Letters, 2023 We interpret the peculiar supersolar nitrogen abundance recently reported by the James Webb Space Telescope observations for GN-z11 (z = 10.6) using our state-of-the-art chemical evolution models.
C. Kobayashi, A. Ferrara
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GN-z11: The environment of an active galactic nucleus at z=10.603. New insights into the most distant Ly alpha detection [PDF]
Astronomy & Astrophysics, 2023 Recent observations with the James Webb Space Telescope (JWST) have further refined the spectroscopic redshift of GN-z11, one of the most distant galaxies identified with the Hubble Space Telescope, at $z=10.603$.
J. Scholtz +23 more
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Multiple Channels for Nitrogen Pollution by Metal-enriched Supermassive Stars and Implications for GN-z11 [PDF]
Astrophysical Journal Letters, 2023 GN-z11 is an unusually luminous high-redshift galaxy that was recently observed to have strong nitrogen lines while at the same time lacking traditional signatures of active galactic nucleus activity.
Chris Nagele, H. Umeda
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A model for GN-z11: top-heavy stellar initial mass functions in forming galactic nuclei and ultra-compact dwarfs [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2023 Recent JWST observations of the z=10.6 galaxy GN-z11 have revealed a very high gas-phase nitrogen abundance (higher than four times the solar value), a very small half-light radius (≈60 pc), and a large stellar mass (Ms ≈ 109M⊙) for its size.
K. Bekki, T. Tsujimoto
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