Conveners
Session M7
- Evan S. Scannapieco (Arizona State University)
Kelly Patton
(University of Washington)
25/05/2018, 09:00
invited talk
We present calculations of the neutrino emissivities and energy spectra from massive stars in the lead up to their explosion as supernovae (presupernovae). Results from the stellar evolution code MESA are used to calculate the neutrino emissivity due to thermal and beta processes. In particular, the beta processes are modeled in detail using a network of 204 isotopes. We show that the...
Mr
Michael Quinonez
(National Superconducting Cyclotron Laboratory, Michigan State University)
25/05/2018, 09:30
contributed talk
Deuteron induced reactions serve as useful tools for extracting nuclear structure information, as well as for describing astrophysically relevant sites. These (d,p) reactions can be understood using a three-body (proton + neutron + target) Hamiltonian, which contains the nucleon-nucleon interaction as well as an effective nucleon-nucleus potential. Separable potentials simplify these reaction...
Mr
James Kelly
(University of Notre Dame)
25/05/2018, 09:45
contributed talk
The astrophysical r-process generates around half of the elements heavier than iron, yet precisely where or how this occurs remains a topic of intense inquiry. Understanding the formation of one of its hallmarks, the rare-earth abundance peak, could shed light on the astrophysical sites because this feature is very sensitive to underlying nuclear properties, particularly to nuclear binding...
Benjamin Wehmeyer
(Department of Physics, North Carolina State University, Raleigh, NC 27695-8202, USA)
25/05/2018, 10:00
contributed talk
The origin of the heaviest elements is still a matter of debate. For the
rapid neutron capture process (“r-process”), multiple sites have been
proposed, e.g., neutron star mergers and (sub-classes) of rare types of supernovae.
The r-process elements have been measured in a large fraction of metal-poor stars.
Galactic archaeology studies show that the r-process
abundances among these...
Alexander Ji
(Carnegie Observatories)
25/05/2018, 10:15
contributed talk
The ultra-faint dwarf galaxy Reticulum II experienced a single prolific r-process event that left ~80% of its stars extremely enriched in r-process elements. I will present abundances of ~40 elements derived from a high signal-to-noise and high-resolution spectrum of the brightest star in Reticulum II. Precise measurements of elements from all three r-process peaks reaffirm the universal...