Lithium abundances in sunspots from observations made in 2014

Lithium abundances in sunspots from observations made in 2014

Spectra of sunspots in the regions of the Li I 6708 Å line and certain Fe I and Ca I lines are presented. The observations wee carried out in August 2014 using a CCD array mounted at the BST-2 telescope of the Crimean Astrophysical Observatory. Sunspot models based on the observed Fe I and Ca I line...

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Veröffentlicht in:Astronomy reports 2016-08, Vol.60 (8), p.776-779
Hauptverfasser: Baranovskii, E. A., Tarashchuk, V. P.
Format: Artikel
Sprache:eng
Schlagworte:
Abundance
Arrays
Astronomy
Astrophysics
Lithium
Observations and Techniques
Physics
Physics and Astronomy
Spectra
Spectral lines
Sunspots
Telescopes
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Beschreibung
Zusammenfassung:Spectra of sunspots in the regions of the Li I 6708 Å line and certain Fe I and Ca I lines are presented. The observations wee carried out in August 2014 using a CCD array mounted at the BST-2 telescope of the Crimean Astrophysical Observatory. Sunspot models based on the observed Fe I and Ca I line profiles have been computed, and used together with the observed Li I 6708 Å profiles to determine the lithium abundances. The mean lithium abundance for the sunspots observed on August 26, 2014 is log A (Li) = 1.2 (on a scale for which log A (H) = 12.0). Sunspot spectra obtained on October 8, 2011 were also analyzed, yielding log A (Li) = 1.02.
ISSN:1063-7729
1562-6881
DOI:10.1134/S1063772916080035