Pair interactions impact on CCSNe simulations Aurore Betranhandy - - PowerPoint PPT Presentation

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Pair interactions impact on CCSNe simulations Aurore Betranhandy - - PowerPoint PPT Presentation

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Pair interactions impact on CCSNe simulations Aurore Betranhandy Evan OConnor Compact Object for All, Lund Feb. 11 th 2020 What are supernovae ? Collapse Feb. 11th 2020 A. Betranhandy - Compact Object for All 2 What are supernovae ?

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Pair interactions impact on CCSNe simulations

Aurore Betranhandy Evan O’Connor

Compact Object for All, Lund

  • Feb. 11th 2020
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SLIDE 2
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  • A. Betranhandy - Compact Object for All

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What are supernovae ?

Collapse

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SLIDE 3
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What are supernovae ?

Collapse Bounce

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SLIDE 4
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What are supernovae ?

Bounce Shock stalling Collapse

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SLIDE 5
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What are supernovae ?

ν ν

Collapse Bounce Shock stalling Revival

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SLIDE 6
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What are supernovae ?

Collapse Bounce Shock stalling Revival Explosion

ν ν

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SLIDE 7
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Codes and Progenitors

  • NuLib

Open source neutrino interactions library

  • GR1D

General relativity hydrodynamic M1 transport

  • Progenitors

z9.6 : 9.6 M☉ progenitor, explodes in 1D s20 : 20 M☉ progenitor, well studied

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Pair interactions

  • Electron-positron annihilation

Fit version Kernels

O’Connor (2015) Bruenn et al. (1985)

  • Nucleon-nucleon Bremsstrahlung

Fit version Kernels

Burrows et al. (2006) One Pion Exchange (OPE)

Hannestad and Rafgelt (1998)

T-matrix

Guo et al. (2019)

e+ e-

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SLIDE 9
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z9.6 shock evolution

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Mass accretion history

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z9.6 mean neutrino energy

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z9.6 neutrino luminosities

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s20 neutrino quantities

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s20 shock evolution

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Impact of

e+ e-

  • Both progenitors show a major impact of

the electron-positron annihilation

  • Higher luminosities

x

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Impact of

  • No clear trend, varies depending on the

progenitor

  • Still shows a difgerence depending on the

treatment

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Conclusion

  • Electron-positron annihilation needs to be

treated in an accurate way

  • Bremsstrahlung treatments seems to

have lower impact

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Looking forward

  • Expand the study to higher dimensions
  • Adding neutrino fmavor change via

scattering

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SLIDE 19
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Thank you !

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SLIDE 20
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Additional

z9.6 s20