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Center-to-limb vari...
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Pietrow, Alexander G. M.,1991-Stockholms universitet,Institutionen för astronomi,Leibniz-Institut für Astrophysik Potsdam (AIP), Germany
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Center-to-limb variation of spectral lines and continua observed with SST/CRISP and SST/CHROMIS
- Article/chapterEnglish2023
Publisher, publication year, extent ...
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2023-03-17
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EDP Sciences,2023
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LIBRIS-ID:oai:DiVA.org:su-216958
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-216958URI
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https://doi.org/10.1051/0004-6361/202244811DOI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
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Context. Observations of center-to-limb variations (CLVs) of spectral lines and continua provide a good test for the accuracy of models with a solar and stellar atmospheric structure and spectral line formation. They are also widely used to constrain elemental abundances, and are becoming increasingly more important in atmospheric studies of exoplanets. However, only a few such data sets exist for chromospheric lines.Aims. We aim to create a set of standard profiles by means of mosaics made with the CRISP and CHROMIS instruments of the Swedish 1-m Solar Telescope (SST), as well as to explore the robustness of said profiles obtained using this method.Methods. For each spectral line, we used a mosaic that ranges from the center to the limb. Each of these mosaics were averaged down to 50 individual spectral profiles and spaced by 0.02 in the μ scale. These profiles were corrected for p-mode oscillations, and their line parameters (equivalent width, line shift, full-width at half-maximum, and line depth) were then compared against literature values whenever possible.Results. We present a set of 50 average profiles that are spaced equidistantly along the cosine of the heliocentric angle (μ) by steps of 0.02 for five continuum points between 4001 and 7772 Å, as well as ten of the most commonly observed spectral lines at the SST (Ca II H & K, Ηβ, Mg I 5173 Å, C I 5380 Å, Fe I 6173 Å, Fe I 6301 Å, Ha, O I 7772 Å, and Ca II 8542 Å).Conclusions. The CLV of line profiles and continua are shared in the CDS as machine readable tables, providing a quantitative constraint on theoretical models that aim to model stellar atmospheres.
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Kiselman, Dan,1963-Stockholms universitet,Institutionen för astronomi(Swepub:su)dan
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Andriienko, Oleksii,1972-Stockholms universitet,Institutionen för astronomi(Swepub:su)olad6860
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Petit Dit de la Roche, D. J. M.
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Díaz Baso, Carlos José,1991-Stockholms universitet,Institutionen för astronomi,University of Oslo, Norway(Swepub:su)cada4215
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Calvo, Flavio,1988-Stockholms universitet,Institutionen för astronomi(Swepub:su)flca3632
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Stockholms universitetInstitutionen för astronomi
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In:Astronomy and Astrophysics: EDP Sciences6710004-63611432-0746
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