241 citations · 1.3k across the 23 of their papers we have counts for
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The Chemical Evolution of Fluorine in the Bulge - High-resolution K-band spectra of giants in three fields
H. Jönsson, N. Ryde, G. M. Harper +6
Possible main formation sites of F in the Universe include AGB stars, the ν-process in Type II SNe, and/or W-R stars. The importance of the W-R stars has theoretically been questio…
Sulphur abundances in halo giants from the [S I] line at 1082 nm and the S I triplet around 1045 nm
H. Jönsson, N. Ryde, P. E. Nissen +4
It is still debated whether or not the Galactic chemical evolution of sulphur in the halo followed the constant or flat trend with [Fe/H], ascribed to the result of explosive nucle…
An abundance study of red-giant-branch stars in the Hercules dwarf spheroidal galaxy
D. Adén, K. Eriksson, S. Feltzing +3
Using high-resolution spectroscopy, we provide a determination of [Fe/H] and [Ca/H] for confirmed red-giant branch member stars of the Hercules dwarf spheroidal galaxy. Based on th…
Evidence of enrichment by individual supernova from elemental abundance ratios in the very metal-poor dSph galaxy Bootes I
S. Feltzing, K. Eriksson, J. Kleyna +1
Aim: We establish the mean metallicity from high-resolution spectroscopy for the recently found dwarf spheroidal galaxy Bootes I and test whether it is a common feature for ultra-f…