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Solar oxygen abunda...
Solar oxygen abundance using SST/CRISP center-to-limb observations of the O I 7772 Å line
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- Pietrow, Alexander G. M., 1991- (author)
- Stockholms universitet,Institutionen för astronomi,Leibniz-Institut für Astrophysik Potsdam, Germany
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Hoppe, R. (author)
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Bergemann, M. (author)
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- Calvo, Flavio, 1988- (author)
- Stockholms universitet,Institutionen för astronomi,University of Lausanne, Switzerland
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(creator_code:org_t)
- 2023
- 2023
- English.
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In: Astronomy and Astrophysics. - 0004-6361 .- 1432-0746. ; 672
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- Solar oxygen abundance measurements based on the O I near-infrared triplet have been a much debated subject for several decades, since non-local thermodynamic equilibrium (NLTE) calculations with 3D radiation-hydrodynamics model atmospheres introduced a large change to the 1D LTE modeling. In this work, we aim to test solar line formation across the solar disk using new observations obtained with the SST/CRISP instrument. The observed data set is based on a spectroscopic mosaic that stretches from disk center to the solar limb. By comparing the state-of-the-art 3D NLTE models with the data, we find that the 3D NLTE models provide an excellent description of the line formation across the disk. We obtain an abundance value of A(O)=(8.73 +/- 0.03) dex, with a very small angular dispersion across the disk. We conclude that spectroscopic mosaics are excellent probes for geometric and physical properties of hydrodynamics models and NLTE line formation.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- Sun: abundances
- atomic data
- radiative transfer
- techniques: spectroscopic
- Sun: photosphere
Publication and Content Type
- ref (subject category)
- art (subject category)
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