dc.contributor.author | Kobayashi, Chiaki | |
dc.contributor.author | Ferrara, Andrea | |
dc.date.accessioned | 2024-03-25T13:32:32Z | |
dc.date.available | 2024-03-25T13:32:32Z | |
dc.date.issued | 2024-02-06 | |
dc.identifier.citation | Kobayashi , C & Ferrara , A 2024 , ' Rapid Chemical Enrichment by Intermittent Star Formation in GN-z11 ' , Astrophysical Journal Letters , vol. 962 , no. 1 , L6 , pp. 1-7 . https://doi.org/10.3847/2041-8213/ad1de1 | |
dc.identifier.issn | 2041-8205 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/2308.15583v1 | |
dc.identifier.other | ORCID: /0000-0002-4343-0487/work/152842382 | |
dc.identifier.uri | http://hdl.handle.net/2299/27558 | |
dc.description | © 2024 The Author(s). Published by the American Astronomical Society. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY), https://creativecommons.org/licenses/by/4.0/ | |
dc.description.abstract | 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. The observed CNO ratios can be successfully reproduced—independently of the adopted initial mass function, nucleosynthesis yields, and presence of supermassive (>1000M ⊙) stars—if the galaxy has undergone an intermittent star formation history with a quiescent phase lasting ∼100 Myr, separating two strong starbursts. Immediately after the second burst, Wolf-Rayet stars (up to 120M ⊙) become the dominant enrichment source, also temporarily (<1 Myr) enhancing particular elements (N, F, Na, and Al) and isotopes ( 13C and 18O). Alternative explanations involving (i) single burst models, also including very massive stars and/or pair-instability supernovae, or (ii) pre-enrichment scenarios fail to match the data. Feedback-regulated, intermittent star formation might be common in early systems. Elemental abundances can be used to test this hypothesis and to get new insights on nuclear and stellar astrophysics. | en |
dc.format.extent | 7 | |
dc.format.extent | 828835 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astrophysical Journal Letters | |
dc.subject | astro-ph.GA | |
dc.subject | astro-ph.HE | |
dc.subject | astro-ph.SR | |
dc.title | Rapid Chemical Enrichment by Intermittent Star Formation in GN-z11 | en |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.contributor.institution | School of Physics, Engineering & Computer Science | |
dc.contributor.institution | Department of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
dc.identifier.url | http://www.scopus.com/inward/record.url?scp=85184878547&partnerID=8YFLogxK | |
rioxxterms.versionofrecord | 10.3847/2041-8213/ad1de1 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |