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Fluorine in the solar neighborhood: Chemical evolution models
Univ Trieste, Dipartimento Fis, Sez Astron, Via GB Tiepolo 11, I-34131 Trieste, Italy.;INAF, Osservatorio Astron Trieste, Via GB Tiepolo 11, I-34131 Trieste, Italy..
Univ Trieste, Dipartimento Fis, Sez Astron, Via GB Tiepolo 11, I-34131 Trieste, Italy.;INAF, Osservatorio Astron Trieste, Via GB Tiepolo 11, I-34131 Trieste, Italy.;INFN, Sez Trieste, Via Valerio 2, I-34100 Trieste, Italy..
Lund Univ, Dept Astron & Theoret Phys, Lund Observ, Box 43, S-22100 Lund, Sweden..ORCID-id: 0000-0002-4912-8609
Lund Univ, Dept Astron & Theoret Phys, Lund Observ, Box 43, S-22100 Lund, Sweden..
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2018 (Engelska)Ingår i: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 612, artikel-id A16Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Context. In light of new observational data related to fluorine abundances in solar neighborhood stars, we present chemical evolution models testing various fluorine nucleosynthesis prescriptions with the aim to best fit those new data. Aims. We consider chemical evolution models in the solar neighborhood testing various nucleosynthesis prescriptions for fluorine production with the aim of reproducing the observed abundance ratios [F/O] versus [O/H] and [F/Fe] versus [Fe/H]. We study in detail the effects of various stellar yields on fluorine production. Methods. We adopted two chemical evolution models: the classical two-infall model, which follows the chemical evolution of halo-thick disk and thin disk phases; and the one-infall model, which is designed only for thin disk evolution. We tested the effects on the predicted fluorine abundance ratios of various nucleosynthesis yield sources, that is, asymptotic giant branch (AGB) stars, Wolf-Rayet (W-R) stars, Type II and Type Ia supernovae, and novae. Results. The fluorine production is dominated by AGB stars but the W-R stars are required to reproduce the trend of the observed data in the solar neighborhood with our chemical evolution models. In particular, the best model both for the two-infall and one-infall cases requires an increase by a factor of 2 of the W-R yields. We also show that the novae, even if their yields are still uncertain, could help to better reproduce the secondary behavior of F in the [F/O] versus [O/H] relation. Conclusions. The inclusion of the fluorine production by W-R stars seems to be essential to reproduce the new observed ratio [F/O] versus [O/H] in the solar neighborhood. Moreover, the inclusion of novae helps to reproduce the observed fluorine secondary behavior substantially.

Ort, förlag, år, upplaga, sidor
EDP SCIENCES S A , 2018. Vol. 612, artikel-id A16
Nyckelord [en]
Galaxy: abundances, Galaxy: evolution, ISM: general
Nationell ämneskategori
Astronomi, astrofysik och kosmologi
Identifikatorer
URN: urn:nbn:se:mau:diva-65207DOI: 10.1051/0004-6361/201732092ISI: 000430139200002Scopus ID: 2-s2.0-85045518468OAI: oai:DiVA.org:mau-65207DiVA, id: diva2:1829612
Tillgänglig från: 2024-01-19 Skapad: 2024-01-19 Senast uppdaterad: 2024-01-19Bibliografiskt granskad

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Jönsson, H.

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Totalt: 27 träffar
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