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Extended atomic data for oxygen abundance analyses
Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China..
Malmö University, Faculty of Technology and Society (TS), Department of Materials Science and Applied Mathematics (MTM).ORCID iD: 0000-0001-6818-9637
Uppsala Univ, Dept Phys & Astron, Theoret Astrophys, Box 516, S-75120 Uppsala, Sweden..
Huizhou Univ, Sch Elect Informat & Elect Engn, Huizhou 516007, Peoples R China..
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2023 (English)In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 674, article id A54Article in journal (Refereed) Published
Abstract [en]

As the most abundant element in the universe after hydrogen and helium, oxygen plays a key role in planetary, stellar, and galactic astrophysics. Its abundance is especially influential in terms of stellar structure and evolution, and as the dominant opacity contributor at the base of the Sun's convection zone, it is central to the discussion on the solar modelling problem. However, abundance analyses require complete and reliable sets of atomic data. We present extensive atomic data for O I by using the multiconfiguration Dirac-Hartree-Fock and relativistic configuration interaction methods. We provide the lifetimes and transition probabilities for radiative electric dipole transitions and we compare them with results from previous calculations and available measurements. The accuracy of the computed transition rates is evaluated by the differences between the transition rates in Babushkin and Coulomb gauges, as well as via a cancellation factor analysis. Out of the 989 computed transitions in this work, 205 are assigned to the accuracy classes AA-B, that is, with uncertainties smaller than 10%, following the criteria defined by the Atomic Spectra Database from the National Institute of Standards and Technology. We discuss the influence of the new log(gf) values on the solar oxygen abundance, ultimately advocating for log epsilon(O) = 8.70 +/- 0.04.

Place, publisher, year, edition, pages
EDP Sciences, 2023. Vol. 674, article id A54
Keywords [en]
atomic data, Sun: abundances
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:mau:diva-61959DOI: 10.1051/0004-6361/202245645ISI: 001000113500006Scopus ID: 2-s2.0-85162085336OAI: oai:DiVA.org:mau-61959DiVA, id: diva2:1789005
Available from: 2023-08-17 Created: 2023-08-17 Last updated: 2023-08-17Bibliographically approved

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Jönsson, P.

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