255 citations · 5.8k across the 143 of their papers we have counts for
8 papers · 1 filter
Iron-Group Abundances in the Metal-Poor Main Sequence Turnoff Star HD~84937
Christopher Sneden, John J. Cowan, Chiaki Kobayashi +4
We have derived new very accurate abundances of the Fe-group elements Sc through Zn (Z = 21-30) in the bright main-sequence turnoff star HD 84937, based on high-resolution spectra…
-process production in rotating massive stars at solar and low metallicities
Urs Frischknecht, Raphael Hirschi, Marco Pignatari +7
Rotation was shown to have a strong impact on the structure and light element nucleosynthesis in massive stars. In particular, models including rotation can reproduce the primary n…
Mn abundances in the stars of the Galactic disc with metallicities -1.0 < [Fe/H] < 0.3
T. Mishenina, T. Gorbaneva, M. Pignatari +2
In this work we present and discuss the observations of the Mn abundances for 247 FGK dwarfs, located in the Galactic disc with metallicity -1<Fe/H]<+0.3. The observed stars belong…
Uncertainties in Galactic Chemical Evolution Models
Benoit Côté, Christian Ritter, Brian W. O'Shea +4
We use a simple one-zone galactic chemical evolution model to quantify the uncertainties generated by the input parameters in numerical predictions, for a galaxy with properties si…
Nucleosynthesis simulations for the production of the p-nuclei Mo and Mo in a Supernova type II model
Kathrin Göbel, Jan Glorius, Alexander Koloczek +4
We present a nucleosynthesis sensitivity study for the -process in a Supernova type II model within the NuGrid research platform. The simulations aimed at identifying the releva…
Carbon-rich presolar grains from massive stars. Subsolar 12C/13C and 14N/15N ratios and the mystery of 15N
M. Pignatari, E. Zinner, P. Hoppe +7
Carbon-rich grains with isotopic anomalies compared to the Sun are found in primitive meteorites. They were made by stars, and carry the original stellar nucleosynthesis signature.…
The i-process and CEMP-r/s stars
L. Dardelet, C. Ritter, P. Prado +10
We investigate whether the anomalous elemental abundance patterns in some of the C-enhanced metal-poor-s+r (CEMP-r/s) stars are consistent with predictions of nucleosynthesis yield…
Galactic evolution of rapid neutron capture process abundances: the inhomogeneous approach
B. Wehmeyer, M. Pignatari, F. -K. Thielemann
For the origin of heavy r-process elements, different sources have been proposed, e.g., core-collapse supernovae or neutron star mergers. Old metal-poor stars carry the signature o…