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The solar Mg abundance from strong spectral lines in the infrared
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Astrophysics.
2019 (English)Student paper other, 10 HE creditsStudent thesis
Abstract [en]

This project aims to determine the solar Mg abundance with two infrared spectral lines: MgI λ10811 and λ10965. Downloaded line data from VALD are updated with modern values for the oscillator strengths and van der Waals damping parameters, the latter obtained through ABO theory. Utilizing SME, the Mg abundances of synthetic spectra are fitted with respect to a solar atlas. The derived abundance for varied turbulence configurations is found to be between logAMg+12 = 7.40–7.52, which is slightly lower than meteoric and 3D-modeled values. Suggested improvements would be to consider the effects of NLTE and line blending.

Place, publisher, year, edition, pages
2019. , p. 10
Series
FYSAST ; FYSPROJ1149
Keywords [en]
Sun: Mg abundance – line broadening: ABO theory – VALD – SME
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:uu:diva-399039OAI: oai:DiVA.org:uu-399039DiVA, id: diva2:1377478
Educational program
Master Programme in Physics
Supervisors
Examiners
Available from: 2019-12-17 Created: 2019-12-11 Last updated: 2019-12-17Bibliographically approved

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CiteExportLink to record
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  • apa
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