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Title: NUCLEOSYNTHESIS IN CORE-COLLAPSE SUPERNOVA EXPLOSIONS TRIGGERED BY A QUARK-HADRON PHASE TRANSITION

Abstract

We explore heavy-element nucleosynthesis in the explosion of massive stars that are triggered by a quark-hadron phase transition during the early post-bounce phase of core-collapse supernovae. The present study is based on general-relativistic radiation hydrodynamics simulations with three-flavor Boltzmann neutrino transport in spherical symmetry, which utilize a quark-hadron hybrid equation of state based on the MIT bag model for strange quark matter. The quark-hadron phase transition inside the stellar core forms a shock wave propagating toward the surface of the proto-neutron star. This shock wave results in an explosion and ejects neutron-rich matter from the outer accreted layers of the proto-neutron star. Later, during the cooling phase, the proto-neutron star develops a proton-rich neutrino-driven wind. We present a detailed analysis of the nucleosynthesis outcome in both neutron-rich and proton-rich ejecta and compare our integrated nucleosynthesis with observations of the solar system and metal-poor stars. For our standard scenario, we find that a 'weak' r-process occurs and elements up to the second peak (A {approx} 130) are successfully synthesized. Furthermore, uncertainties in the explosion dynamics could barely allow us to obtain the strong r-process which produces heavier isotopes, including the third peak (A {approx} 195) and actinide elements.

Authors:
; ; ; ; ;  [1]; ;  [2];  [3];  [4]
  1. Department of Physics, University of Basel, CH-4056 Basel (Switzerland)
  2. GSI, Helmholtzzentrum fuer Schwerionenforschung GmbH, D-64291 Darmstadt (Germany)
  3. Department of Physics, North Carolina State University, NC 27695 (United States)
  4. Department of Physics and Astronomy, Michigan State University, MI 48824 (United States)
Publication Date:
OSTI Identifier:
22092126
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 758; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTROPHYSICS; BAG MODEL; COMPARATIVE EVALUATIONS; COSMOLOGY; ELEMENT ABUNDANCE; EQUATIONS OF STATE; FLAVOR MODEL; HYDRODYNAMICS; NEUTRINOS; NEUTRON STARS; NEUTRONS; NUCLEOSYNTHESIS; PHASE TRANSFORMATIONS; PROTONS; PROTOSTARS; QUARK MATTER; R PROCESS; RELATIVISTIC RANGE; S QUARKS; SUPERNOVAE

Citation Formats

Nishimura, Nobuya, Thielemann, Friedrich-Karl, Hempel, Matthias, Kaeppeli, Roger, Rauscher, Thomas, Winteler, Christian, Fischer, Tobias, Martinez-Pinedo, Gabriel, Froehlich, Carla, and Sagert, Irina. NUCLEOSYNTHESIS IN CORE-COLLAPSE SUPERNOVA EXPLOSIONS TRIGGERED BY A QUARK-HADRON PHASE TRANSITION. United States: N. p., 2012. Web. doi:10.1088/0004-637X/758/1/9.
Nishimura, Nobuya, Thielemann, Friedrich-Karl, Hempel, Matthias, Kaeppeli, Roger, Rauscher, Thomas, Winteler, Christian, Fischer, Tobias, Martinez-Pinedo, Gabriel, Froehlich, Carla, & Sagert, Irina. NUCLEOSYNTHESIS IN CORE-COLLAPSE SUPERNOVA EXPLOSIONS TRIGGERED BY A QUARK-HADRON PHASE TRANSITION. United States. https://doi.org/10.1088/0004-637X/758/1/9
Nishimura, Nobuya, Thielemann, Friedrich-Karl, Hempel, Matthias, Kaeppeli, Roger, Rauscher, Thomas, Winteler, Christian, Fischer, Tobias, Martinez-Pinedo, Gabriel, Froehlich, Carla, and Sagert, Irina. 2012. "NUCLEOSYNTHESIS IN CORE-COLLAPSE SUPERNOVA EXPLOSIONS TRIGGERED BY A QUARK-HADRON PHASE TRANSITION". United States. https://doi.org/10.1088/0004-637X/758/1/9.
@article{osti_22092126,
title = {NUCLEOSYNTHESIS IN CORE-COLLAPSE SUPERNOVA EXPLOSIONS TRIGGERED BY A QUARK-HADRON PHASE TRANSITION},
author = {Nishimura, Nobuya and Thielemann, Friedrich-Karl and Hempel, Matthias and Kaeppeli, Roger and Rauscher, Thomas and Winteler, Christian and Fischer, Tobias and Martinez-Pinedo, Gabriel and Froehlich, Carla and Sagert, Irina},
abstractNote = {We explore heavy-element nucleosynthesis in the explosion of massive stars that are triggered by a quark-hadron phase transition during the early post-bounce phase of core-collapse supernovae. The present study is based on general-relativistic radiation hydrodynamics simulations with three-flavor Boltzmann neutrino transport in spherical symmetry, which utilize a quark-hadron hybrid equation of state based on the MIT bag model for strange quark matter. The quark-hadron phase transition inside the stellar core forms a shock wave propagating toward the surface of the proto-neutron star. This shock wave results in an explosion and ejects neutron-rich matter from the outer accreted layers of the proto-neutron star. Later, during the cooling phase, the proto-neutron star develops a proton-rich neutrino-driven wind. We present a detailed analysis of the nucleosynthesis outcome in both neutron-rich and proton-rich ejecta and compare our integrated nucleosynthesis with observations of the solar system and metal-poor stars. For our standard scenario, we find that a 'weak' r-process occurs and elements up to the second peak (A {approx} 130) are successfully synthesized. Furthermore, uncertainties in the explosion dynamics could barely allow us to obtain the strong r-process which produces heavier isotopes, including the third peak (A {approx} 195) and actinide elements.},
doi = {10.1088/0004-637X/758/1/9},
url = {https://www.osti.gov/biblio/22092126}, journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 758,
place = {United States},
year = {Wed Oct 10 00:00:00 EDT 2012},
month = {Wed Oct 10 00:00:00 EDT 2012}
}