Observational constraints on the origin of the elements Article Swipe
A. J. Gallagher
,
M. Bergemann
,
R. Collet
,
B. Plez
,
J. Leenaarts
,
M. Carlsson
,
S. A. Yakovleva
,
A. K. Belyaev
·
YOU?
·
· 2019
· Open Access
·
· DOI: https://doi.org/10.1051/0004-6361/201936104
YOU?
·
· 2019
· Open Access
·
· DOI: https://doi.org/10.1051/0004-6361/201936104
Context. The pursuit of more realistic spectroscopic modelling and consistent abundances has led us to begin a new series of papers designed to improve current solar and stellar abundances of various atomic species. To achieve this, we have begun updating the three-dimensional (3D) non-local thermodynamic equilibrium (non-LTE) radiative transfer code, MULTI3D, and the equivalent one-dimensional (1D) non-LTE radiative transfer code, MULTI 2.3. Aims. We examine our improvements to these codes by redetermining the solar barium abundance. Barium was chosen for this test as it is an important diagnostic element of the s -process in the context of galactic chemical evolution. New Ba II + H collisional data for excitation and charge exchange reactions computed from first principles had recently become available and were included in the model atom. The atom also includes the effects of isotopic line shifts and hyperfine splitting. Methods. A grid of 1D LTE barium lines were constructed with MULTI 2.3 and fit to the four Ba II lines available to us in the optical region of the solar spectrum. Abundance corrections were then determined in 1D non-LTE, 3D LTE, and 3D non-LTE. A new 3D non-LTE solar barium abundance was computed from these corrections. Results. We present for the first time the full 3D non-LTE barium abundance of A (Ba) = 2.27 ± 0.02 ± 0.01, which was derived from four individual fully consistent barium lines. Errors here represent the systematic and random errors, respectively.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1051/0004-6361/201936104
- https://www.aanda.org/articles/aa/pdf/2020/02/aa36104-19.pdf
- OA Status
- hybrid
- Cited By
- 57
- References
- 74
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4288083736
All OpenAlex metadata
Raw OpenAlex JSON
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https://doi.org/10.1051/0004-6361/201936104Digital Object Identifier
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Observational constraints on the origin of the elementsWork title
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articleOpenAlex work type
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enPrimary language
- Publication year
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2019Year of publication
- Publication date
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2019-10-23Full publication date if available
- Authors
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A. J. Gallagher, M. Bergemann, R. Collet, B. Plez, J. Leenaarts, M. Carlsson, S. A. Yakovleva, A. K. BelyaevList of authors in order
- Landing page
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https://doi.org/10.1051/0004-6361/201936104Publisher landing page
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https://www.aanda.org/articles/aa/pdf/2020/02/aa36104-19.pdfDirect link to full text PDF
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YesWhether a free full text is available
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hybridOpen access status per OpenAlex
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https://www.aanda.org/articles/aa/pdf/2020/02/aa36104-19.pdfDirect OA link when available
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Physics, Observational study, Astrophysics, Astronomy, Medicine, PathologyTop concepts (fields/topics) attached by OpenAlex
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57Total citation count in OpenAlex
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2025: 9, 2024: 12, 2023: 8, 2022: 6, 2021: 13Per-year citation counts (last 5 years)
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10Other works algorithmically related by OpenAlex
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