Nucleosynthetic yields of intermediate-mass primordial to extremely metal-poor stars

Stellar structure and evolution.

Bibliographic Details
Authors: Gil Pons, Pilar, Doherty, C. L., Campbell, S. W., Gutiérrez, Jordi
Format: article
Status:Published version
Publication Date:2022
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/295534
Online Access:http://hdl.handle.net/10261/295534
Access Level:Open access
Keyword:Stars: abundances
Stars: AGB and post-AGB
Stars: Population II
Stars: evolution
id ES_38da9abb182bd68b6051d933dbf8b2bc
oai_identifier_str oai:digital.csic.es:10261/295534
network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv Nucleosynthetic yields of intermediate-mass primordial to extremely metal-poor stars
title Nucleosynthetic yields of intermediate-mass primordial to extremely metal-poor stars
spellingShingle Nucleosynthetic yields of intermediate-mass primordial to extremely metal-poor stars
Gil Pons, Pilar
Stars: abundances
Stars: AGB and post-AGB
Stars: Population II
Stars: evolution
title_short Nucleosynthetic yields of intermediate-mass primordial to extremely metal-poor stars
title_full Nucleosynthetic yields of intermediate-mass primordial to extremely metal-poor stars
title_fullStr Nucleosynthetic yields of intermediate-mass primordial to extremely metal-poor stars
title_full_unstemmed Nucleosynthetic yields of intermediate-mass primordial to extremely metal-poor stars
title_sort Nucleosynthetic yields of intermediate-mass primordial to extremely metal-poor stars
dc.creator.none.fl_str_mv Gil Pons, Pilar
Doherty, C. L.
Campbell, S. W.
Gutiérrez, Jordi
author Gil Pons, Pilar
author_facet Gil Pons, Pilar
Doherty, C. L.
Campbell, S. W.
Gutiérrez, Jordi
author_role author
author2 Doherty, C. L.
Campbell, S. W.
Gutiérrez, Jordi
author2_role author
author
author
dc.contributor.none.fl_str_mv German Research Foundation
Agencia Estatal de Investigación (España)
Australian Research Council
National Collaborative Research Infrastructure Strategy (Australia)
Ministerio de Ciencia, Innovación y Universidades (España)
dc.subject.none.fl_str_mv Stars: abundances
Stars: AGB and post-AGB
Stars: Population II
Stars: evolution
topic Stars: abundances
Stars: AGB and post-AGB
Stars: Population II
Stars: evolution
description Stellar structure and evolution.
publishDate 2022
dc.date.none.fl_str_mv 2022
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/295534
url http://hdl.handle.net/10261/295534
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-109363GB-I00
Astronomy and Astrophysics
https://doi.org/10.1051/0004-6361/202244062
No
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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spelling Nucleosynthetic yields of intermediate-mass primordial to extremely metal-poor starsGil Pons, PilarDoherty, C. L.Campbell, S. W.Gutiérrez, JordiStars: abundancesStars: AGB and post-AGBStars: Population IIStars: evolutionStellar structure and evolution.[Context] Stellar models and nucleosynthetic yields of primordial to extremely metal-poor (EMP) stars are crucial to interpret the surface abundances of the most metal-poor stars observed and, ultimately, to better understand the earliest stellar populations. In addition, they are key ingredients of Galactic chemical evolution models.[Aims] We aim to better characterise the evolution and fates, and determine updated nucleosynthetic yields of intermediate-mass stars between primordial and EMP metallicity (Z = 10−10, 10−8, 10−7, 10−6, and 10−5). We also probed uncertainties in the nucleosynthesis of the oldest intermediate-mass stars, namely those related to the treatment of convection and convective boundaries and those related to wind prescriptions during the asymptotic giant branch (AGB) phase.[Methods] We analyse the evolution of models from their main sequence, through the thermally pulsing AGB (TP-AGB), to the latest stages of their evolution, using the Monash-Mount Stromlo stellar evolution code MONSTAR. The results were post-processed with the code MONSOON, which allowed for the determination of the nucleosynthetic yields of 77 species up to 62Ni. By comparing them to similar calculations existing in the literature, we inspected the effects of input physics on the nucleosynthesis of EMP models.[Results] From the evolutionary point of view, as reported in former works, we identified proton ingestion episodes (PIEs) in our lowest-mass lowest-metallicity models. Models of Z = 10−10 and Z = 10−8 in a narrow initial mass range around 5 M⊙ experience the cessation of thermal pulses, and their final fates as type-I1/2 supernovae cannot be discarded. However, the initial mass range of models eventually leading to the formation of type-I1/2 and electron-capture supernovae is considerably reduced compared to former works. All the models of initial mass ≳6–7 M⊙ experience a corrosive second dredge-up and, analogously to those experiencing PIEs, undergo significant metal enrichment in their envelopes. The associated increase in their opacities allows them to develop a solar-like TP-AGB or TP-super-AGB, ultimately becoming white dwarfs. Except for those undergoing the cessation of thermal pulses, all of our models show the nucleosynthetic signatures of both efficient third dredge-up and hot-bottom burning, with the activation of the NeNa cycle and the MgAlSi chains. This leads to the creation of vast amounts of CNO, with typical [N/Fe] > 4), and the characteristic abundance signature [N/Fe] > [C/Fe] > [O/Fe]. Our nucleosynthetic yields present dramatic differences with respect to recent results existing in the literature for intermediate-mass models of similar metallicities. The reason for these discrepancies lay in the poorly known input physics related to stellar winds and, above all, the treatment of convection and convective boundaries.This work was supported by the Spanish project PID2019-109363GB-100, and by the German Deutsche Forschungsgemeinschaft, DFG project number Ts 17/2–1. S.W.C. acknowledges federal funding from the Australian Research Council through a Future Fellowship (FT160100046) and Discovery Project (DP190102431). This research was supported by use of the Nectar Research Cloud, a collaborative Australian research platform supported by the National Collaborative Research Infrastructure Strategy (NCRIS).Peer reviewedEDP SciencesGerman Research FoundationAgencia Estatal de Investigación (España)Australian Research CouncilNational Collaborative Research Infrastructure Strategy (Australia)Ministerio de Ciencia, Innovación y Universidades (España)202320232022info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/295534reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-109363GB-I00Astronomy and Astrophysicshttps://doi.org/10.1051/0004-6361/202244062Noinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2955342026-05-22T06:33:51Z
score 15,811543

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