65 citations · 207 across the 9 of their papers we have counts for
10 papers
The Impact of Initial Composition on Massive Star Evolution and Nucleosynthesis
Christopher West, Alexander Heger, Benoit Cote +2
We study the sensitivity of presupernova evolution and supernova nucleosynthesis yields of massive stars to variations of the initial composition. We use the solar abundances from…
Galactic Isotopic Decomposition for the Sculptor Dwarf Spheroidal Galaxy
Kanishk Pandey, Christopher West
Stellar evolution models require initial isotopic abundance sets as input, but these abundances are incomplete outside the solar neighborhood, are challenging to infer from element…
The Chemical Evolution of Iron-Peak Elements with Hypernovae
J. J. Grimmett, Amanda I. Karakas, Alexander Heger +2
We calculate the mean evolution of the iron-peak abundance ratios [(Cr,Mn,Co,Zn)/Fe] in the Galaxy, using modern supernova and hypernova chemical yields and a Galactic Chemical Evo…
Catching Element Formation In The Act
Chris L. Fryer, Frank Timmes, Aimee L. Hungerford +216
Gamma-ray astronomy explores the most energetic photons in nature to address some of the most pressing puzzles in contemporary astrophysics. It encompasses a wide range of objects…
Role of core-collapse supernovae in explaining Solar System abundances of p nuclides
C. Travaglio, T. Rauscher, A. Heger +2
The production of the heavy stable proton-rich isotopes between 74Se and 196Hg -- the p nuclides -- is due to the contribution from different nucleosynthesis processes, activated i…
Reducing Uncertainties in the Production of the Gamma Emitting Nuclei 26Al, 44Ti, and 60Fe in Core Collapse Supernovae by Using Effective Helium Burning Rates
Sam Austin, Christopher West, Alexander Heger
We have used effective reaction rates (ERR) for the helium burning reactions to predict the yield of the gamma-emitting nuclei 26Al, 44Ti, and 60Fe in core col- lapse supernovae. T…
Mass and Metallicity Requirement in Stellar Models for Galactic Chemical Evolution Applications
Benoit Côté, Christopher West, Alexander Heger +5
We used a one-zone chemical evolution model to address the question of how many masses and metallicities are required in grids of massive stellar models in order to ensure reliable…
Effective Helium Burning Rates and the Production of the Neutrino Nuclei
Sam M. Austin, Christopher West, Alexander Heger
Effective values for the key helium burning reaction rates, triple-alpha and 12C(alpha,gamma)16O, are obtained by adjusting their strengths so as to obtain the best match with the…
The Impact of Helium-Burning Reaction Rates on Massive Star Evolution and Nucleosynthesis
Christopher West, Alexander Heger, Sam M. Austin
We study the sensitivity of presupernova evolution and supernova nucleosynthesis yields of massive stars to variations of the helium-burning reaction rates within the range of thei…
Metallicity-Dependent Galactic Isotopic Decomposition for Nucleosynthesis
Christopher West, Alexander Heger
All stellar evolution models for nucleosynthesis require an initial isotopic abundance set to use as a starting point. Generally, our knowledge of isotopic abundances of stars is f…