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Title: Neutrino signal from proto-neutron star evolution: Effects of opacities from charged-current–neutrino interactions and inverse neutron decay

Journal Article · · Physical Review. C
ORCiD logo [1];  [2];  [3];  [4]; ORCiD logo [5];  [6];  [7]
  1. Univ. of Wroclaw (Poland)
  2. GSI Helmholtzzentrum für Schwerioneneforschung, Darmstadt (Germany); Academia Sinica, Taipei (Taiwan)
  3. Joint Inst. for Nuclear Research (JINR), Dubna (Russian Federation)
  4. GSI Helmholtzzentrum für Schwerioneneforschung, Darmstadt (Germany); Technische Univ. Darmstadt (Germany)
  5. Academia Sinica, Taipei (Taiwan); National Center for Theoretical Sciences, Hsinchu (Taiwan)
  6. GSI Helmholtzzentrum für Schwerioneneforschung, Darmstadt (Germany)
  7. Univ. of Minnesota, Minneapolis, MN (United States)

In this work, we investigate the impact of charged-current–neutrino processes on the formation and evolution of neutrino spectra during the deleptonization of proto-neutron stars. To this end we develop the full kinematics of these reaction rates consistent with the nuclear equation of state, including weak magnetism contributions. This allows us to systematically study the impact of inelastic contributions and weak magnetism on the $$ν_e$$ and $$\bar{ν}_e$$ luminosities and average energies. Furthermore, we explore the role of the inverse neutron decay, also known as the direct Urca process, on the emitted spectra of $$\bar{ν}_e$$. This process is commonly considered in the cooling scenario of cold neutron stars but has so far been neglected in the evolution of hot proto-neutron stars. We find that the inverse neutron decay becomes the dominating opacity source for low-energy $$\bar{ν}_e$$. Accurate three-flavor Boltzmann neutrino transport enables us to relate the magnitude of neutrino fluxes and spectra to details of the treatment of weak processes. This allows us to quantify the corresponding impact on the conditions relevant for the nucleosynthesis in the neutrino-driven wind, which is ejected from the proto-neutron star surface during the deleptonization phase.

Research Organization:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Centre of Poland (NCN); German Research Foundation (DFG); Taiwan Ministry of Science and Technology (MOST)
Grant/Contract Number:
FG02-87ER40328; UMO-2016/23/B/ST2/00720; 107-2119-674 M-001-038; 108-2112-M-001-010
OSTI ID:
1800659
Alternate ID(s):
OSTI ID: 1599691
Journal Information:
Physical Review. C, Vol. 101, Issue 2; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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