The $\gamma$-process nucleosynthesis in core-collapse supernovae II. Effect of the explosive recipe

Abstract

The $\gamma$-process in core-collapse supernovae (CCSNe) can produce a number of neutron-deficient stable isotopes heavier than iron (p-nuclei). However, current model predictions do to not fully reproduce the solar abundances. We investigate the impact of different explosion energies and parameters on the nucleosynthesis of p-nuclei, by studying stellar models with different initial masses and CCSN explosions. We find that the total p-nuclei yields are only marginally affected by the CCSN explosion prescriptions if the $\gamma$-process production is already efficient in the stellar progenitors due to a C-O shell merger. In most of CCSN explosions from progenitors without C-O shell merger, the $\gamma$-process yields increase with the explosion energy up to an order of magnitude, depending on the progenitor structure and the CCSN prescriptions. The trend of the p-nuclei production with the explosion energy is more complicated if we look at the production of single p-nuclei. The light p-nuclei tend to be the most enhanced with increasing the explosion energy. In particular, for the CCSN models where the $\alpha$-rich freeze-out component is ejected, the yields of the lightest p-nuclei increase by up to three orders of magnitude. We provide the first extensive study using different sets of massive stars of the impact of varying CCSN explosion prescriptions on the production of the p-nuclei. Unlike previous expectations and recent results in the literature, we find that the average production of p-nuclei tends to increase with the explosion energy. We also confirm that the pre-explosive production of p-nuclei in C-O shell mergers is a robust result, independently from the subsequent explosive nucleosynthesis. A realistic range of variations in the evolution of stellar progenitors and in the CCSN explosions might boost the CCSN contribution to the galactic chemical evolution of p-nuclei.

arXiv comment11 pages, 3 figures, 4 tables. Accepted for publication in A&A

References in corpus (33)

• The chemical composition of the Sun
• Modules for Experiments in Stellar Astrophysics (MESA): Binaries, Pulsations, and Explosions
• Compact Remnant Mass Function: Dependence on the Explosion Mechanism and Metallicity
• Nucleosynthesis in Massive Stars With Improved Nuclear and Stellar Physics
• Nucleosynthesis and Evolution of Massive Metal-Free Stars
• Presupernova evolution and explosive nucleosynthesis of rotating massive stars in the metallicity range -3 <=[Fe/H]<= 0
• Constraining the astrophysical origin of the p-nuclei through nuclear physics and meteoritic data
• Evolution, Explosion and Nucleosynthesis of Core Collapse Supernovae
• Three-Dimensional Simulations of Core-Collapse Supernovae: From Shock Revival to Shock Breakout
• NuGrid stellar data set I. Stellar yields from H to Bi for stars with metallicities Z = 0.02 and Z = 0.01
• NuGrid Stellar Data Set. II. Stellar Yields from H to Bi for Stellar Models with Mzams = 1 to 25Msun and Z = 0.0001 to 0.02
• Neutrino-driven wind simulations and nucleosynthesis of heavy elements
• The 12C + 12C reaction and the impact on nucleosynthesis in massive stars
• On Variations Of Pre-Supernova Model Properties
• The production of proton-rich isotopes beyond iron: The $\gamma$ process in stars
• Remnants and ejecta of thermonuclear electron-capture supernovae: Constraining oxygen-neon deflagrations in high-density white dwarfs
• Neutrinos from Fallback onto Newly Formed Neutron Stars
• Convective-reactive nucleosynthesis of K, Sc, Cl and p-process isotopes in O-C shell mergers
• Nucleosynthesis of s-elements in zero-metal AGB stars
• Role of core-collapse supernovae in explaining Solar System abundances of p nuclides
• The Effect of Supernova Convection On Neutron Star and Black Hole Masses
• Parameterizing the Supernova Engine and its Effects on Remnants and Basic Yields
• Explosion mechanism of core-collapse supernovae: role of the Si/O interface
• Origin of the p-process radionuclides 92Nb and 146Sm in the early Solar System and inferences on the birth of the Sun
• The physics of Core-Collapse Supernovae: explosion mechanism and explosive nucleosynthesis
• The Nucleosynthetic Yields of Core-Collapse Supernovae, prospects for the Next Generation of Gamma-Ray Astronomy
• The $\gamma$-process nucleosynthesis in core-collapse supernovae. I. A novel analysis of $\gamma$-process yields in massive stars
• The p-process in exploding rotating massive stars
• Nucleosynthesis in Neutrino-Driven Supernovae
• Radioactive nuclei in the early Solar System: analysis of the 15 isotopes produced by core-collapse supernovae
• Impact of hypernova νp-process nucleosynthesis on the galactic chemical evolution of Mo and Ru
• Realistic 3D hydrodynamics simulations find significant turbulent entrainment in massive stars
• Powering luminous core collapse supernovae with jets

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