Synthesis of the Beryllium 3131A Spectral Region

Ashwell, JF; Jeffries, RD; Smalley, B.

Synthesis of the Beryllium 3131A Spectral Region

Ashwell, JF; Jeffries, RD; Smalley, B.

Authors

JF Ashwell

Robin Jeffries r.d.jeffries@keele.ac.uk

Barry Smalley b.smalley@keele.ac.uk

Abstract

The Beryllium spectral region of the Sun, Procyon and 4 stars in the open cluster NGC6633 up to Teff = 7500K have been synthesised using ATLAS9 model atmospheres and the MOOG spectral synthesis program. The line list used for these syntheses has been modified from the ATLAS9 line list to improve the quality of the fits in light of the improved opacities in the new version of the MOOG code. Significant changes have been made to the Mn I line at ATLAS9 wavelength 3131.037A and an OH line has been added at 3131.358A. In addition there are a number of minor changes to gf-values throughout the synthesised region thus improving the fit for the spectra across the temperature range considerably.