Hydrodynamic simulations of electron-capture supernovae: progenitor and dimension dependence
Abstract
We present neutrino-transport hydrodynamic simulations of electron-capture supernovae (ECSNe) in flash with new two-dimensional (2D) collapsing progenitor models. These progenitor models feature the 2D modelling of oxygen-flame propagation until the onset of core collapse. We perform axisymmetric simulations with six progenitor models that, at the time of collapse, span a range of propagating flame front radii. For comparison, we also perform a simulation with the same set-up using the canonical, spherically symmetrical progenitor model n8.8. We found that the variations in the progenitor models inherited from simulations of stellar evolution and flame propagation do not significantly alter the global properties of the neutrino-driven ECSN explosion, such as the explosion energy (~1.36–1.48 × 1050 erg) and the mass (~0.017–0.018 M⊙) and composition of the ejecta. Due to aspherical perturbations induced by the 2D flame, the ejecta contains a small amount (≲1.8 × 10-3 M⊙) of low-Ye (0.35 < Ye < 0.4) component. The baryonic mass of the protoneutron star is ~1.34 M⊙ (~1.357 M⊙) with the new (n8.8) progenitor models when simulations end at ~400 ms and the discrepancy is due to updated weak-interaction rates in the progenitor evolutionary simulations. Our results reflect the nature of ECSN progenitors containing a strongly degenerate oxygen–neon–magnesium (ONeMg) core and suggest a standardized ECSN explosionmore »
- Publication Date:
- Research Org.:
- Michigan State Univ., East Lansing, MI (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); Swedish Research Council (SRC); National Aeronautics and Space Administration (NASA); World Premier International Research Center Initiative (WPI); Japan Society for the Promotion of Science (JSPS)
- OSTI Identifier:
- 1865699
- Alternate Identifier(s):
- OSTI ID: 1979534
- Grant/Contract Number:
- SC0015904; SC0017955; 2016-07213; HST-946AR-15021.001-A; 80NSSC18K1017; JP17K05382; JP20K04024; JP21H04499
- Resource Type:
- Published Article
- Journal Name:
- Monthly Notices of the Royal Astronomical Society
- Additional Journal Information:
- Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 513 Journal Issue: 1; Journal ID: ISSN 0035-8711
- Publisher:
- Oxford University Press
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; hydrodynamics; stars; neutron; supernovae; general
Citation Formats
Zha, Shuai, O’Connor, Evan P., Couch, Sean M., Leung, Shing-Chi, and Nomoto, Ken’ichi. Hydrodynamic simulations of electron-capture supernovae: progenitor and dimension dependence. United Kingdom: N. p., 2022.
Web. doi:10.1093/mnras/stac1035.
Zha, Shuai, O’Connor, Evan P., Couch, Sean M., Leung, Shing-Chi, & Nomoto, Ken’ichi. Hydrodynamic simulations of electron-capture supernovae: progenitor and dimension dependence. United Kingdom. https://doi.org/10.1093/mnras/stac1035
Zha, Shuai, O’Connor, Evan P., Couch, Sean M., Leung, Shing-Chi, and Nomoto, Ken’ichi. Fri .
"Hydrodynamic simulations of electron-capture supernovae: progenitor and dimension dependence". United Kingdom. https://doi.org/10.1093/mnras/stac1035.
@article{osti_1865699,
title = {Hydrodynamic simulations of electron-capture supernovae: progenitor and dimension dependence},
author = {Zha, Shuai and O’Connor, Evan P. and Couch, Sean M. and Leung, Shing-Chi and Nomoto, Ken’ichi},
abstractNote = {We present neutrino-transport hydrodynamic simulations of electron-capture supernovae (ECSNe) in flash with new two-dimensional (2D) collapsing progenitor models. These progenitor models feature the 2D modelling of oxygen-flame propagation until the onset of core collapse. We perform axisymmetric simulations with six progenitor models that, at the time of collapse, span a range of propagating flame front radii. For comparison, we also perform a simulation with the same set-up using the canonical, spherically symmetrical progenitor model n8.8. We found that the variations in the progenitor models inherited from simulations of stellar evolution and flame propagation do not significantly alter the global properties of the neutrino-driven ECSN explosion, such as the explosion energy (~1.36–1.48 × 1050 erg) and the mass (~0.017–0.018 M⊙) and composition of the ejecta. Due to aspherical perturbations induced by the 2D flame, the ejecta contains a small amount (≲1.8 × 10-3 M⊙) of low-Ye (0.35 < Ye < 0.4) component. The baryonic mass of the protoneutron star is ~1.34 M⊙ (~1.357 M⊙) with the new (n8.8) progenitor models when simulations end at ~400 ms and the discrepancy is due to updated weak-interaction rates in the progenitor evolutionary simulations. Our results reflect the nature of ECSN progenitors containing a strongly degenerate oxygen–neon–magnesium (ONeMg) core and suggest a standardized ECSN explosion initialized by ONeMg core collapse. Moreover, we carry out a rudimentary three-dimensional simulation and find that the explosion properties are fairly compatible with the 2D counterpart. Our paper facilitates a more thorough understanding of ECSN explosions following the ONeMg core collapse, though more three-dimensional simulations are still needed.},
doi = {10.1093/mnras/stac1035},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 1,
volume = 513,
place = {United Kingdom},
year = {Fri Apr 15 00:00:00 EDT 2022},
month = {Fri Apr 15 00:00:00 EDT 2022}
}
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