Conveners
Session M6
- Pavel Denisenkov (University of Victoria)
Dr
marco Pignatari
(University of Hull)
24/05/2018, 14:00
invited talk
The production of heavy elements in stars by neutron-capture processes still present many open puzzles that need to be solved. In these last years, the previous established scenario where the abundance signature beyond iron is dominated only by a combination of s-process and r-process has been questioned by a number of observations in stars at different metallicities, in presolar grains and in...
Ms
Sara Ayoub
(NSCL/MSU)
24/05/2018, 14:30
contributed talk
Proton- and alpha-capture reactions on unstable proton-rich nuclei power astrophysical explosions like novae and X-ray bursts. Studying these processes is crucial to understanding the mechanisms behind those explosions and the nucleosynthesis at those sites. The Separator for Capture Reactions (SECAR) is a new recoil separator currently under construction at the National Superconducting...
Prof.
Sean Couch
(Michigan State University)
24/05/2018, 14:45
contributed talk
We present a new method for artificially driving core-collapse supernova explosions in 1D simulations. Turbulence is important for understanding the CCSN explosion mechanism, since turbulence may add a >20% correction to the total pressure behind the shock and thus aid in the explosion. We have implemented mixing length theory (MLT) and included a model of the turbulent pressure in the FLASH...
Dr
Stephanie Lyons
(National Superconducting Cyclotron Laboratory)
24/05/2018, 15:00
contributed talk
The rapid neutron-capture process, or r-process, is known to produce roughly half of the isotopes of heavy elements. Sensitivity studies have shown that the final abundance distributions of r-process nuclei are greatly impacted by nuclear masses, neutron-capture rates, and $\beta$-decay properties. For this reason, $\beta$-decay intensities for $^{69,71}$Co were measured using the technique of...
Prof.
Anna Frebel
(Massachusetts Institute of Technology)
24/05/2018, 15:15
contributed talk
We report the discovery of J0949-1617, the first bonafide CEMP-r+s
star identified. This class of objects has previously been suggested
to explain stars with neutron-capture element patterns that originate
from neither the r- or s-process alone. We find J0949-1617 to be a
CEMP stars with s-process enhancement that must have formed from gas
enriched by a prior r-process event. The light...