MONTE CARLO NEUTRINO TRANSPORT IN POST-MERGER DISKS S HERWOOD R ICHERS D AN K ASEN , E VAN O’C ONNOR , R ODRIGO F ERNANDEZ , C HRISTIAN O TT
Daniel Perley
Daniel Perley NINJA-2 Catalog
Daniel Perley NINJA-2 Catalog
SHORT GRB • M ERGING COMPACT OBJECTS (L EE & R AMIREZ -R UIZ 2007) • C OLLIMATED JET • 𝑀 𝑗𝑡𝑝 ≈ 10 53 ERG / S ( E . G . B LOOM + 2003) • D ISK COOLS VIA NEUTRINOS • 𝑢 𝑒𝑗𝑔𝑔 ≪ 𝑢 𝑒𝑧𝑜 Metzger & Berger (2011)
NEUTRINOS • A BSORB /E MIT ν e e • D EPOSIT /E MIT E NERGY n p • C HANGE Y E • S CATTER • T RAP N EUTRINOS • R EDISTRIBUTE E NERGY • A NNIHILATE /E MIT • D EPOSIT /E MIT E NERGY
NEUTRINOS • A BSORB /E MIT ν e e • D EPOSIT /E MIT E NERGY n p • C HANGE Y E ν e ν e • S CATTER • T RAP N EUTRINOS p p • R EDISTRIBUTE E NERGY • A NNIHILATE /E MIT • D EPOSIT /E MIT E NERGY
NEUTRINOS • A BSORB /E MIT ν e e • D EPOSIT /E MIT E NERGY n p • C HANGE Y E ν e ν e • S CATTER • T RAP N EUTRINOS p p • R EDISTRIBUTE E NERGY ν e e • A NNIHILATE /E MIT _ • D EPOSIT /E MIT E NERGY ν e e
{ignoring oscillations} NEUTRINOS • A BSORB /E MIT ν e e • D EPOSIT /E MIT E NERGY n p • C HANGE Y E ν e ν e • S CATTER • T RAP N EUTRINOS p p • R EDISTRIBUTE E NERGY ν e e • A NNIHILATE /E MIT _ • D EPOSIT /E MIT E NERGY ν e e
HOW TO MOVE NEUTRINOS
SEDONU + NULIB g/cm 3 ) 8 EOS 1)T AKE F LUID S NAPSHOT ρ T Y e E ν 𝜍 2)E MIT log 10 ( 3)P ROPAGATE 7 NuLib 4)S CATTER AND A BSORB 5)C ALCULATE : 6 • T IMESCALES ε σ scat σ abs • A NNIHILATION R ATES R scat R ann R emit 5 Open-source ! data: Metzger & Fernandez (2014)
SEDONU + NULIB g/cm 3 ) 8 EOS 1)T AKE F LUID S NAPSHOT ρ T Y e E ν 𝜍 2)E MIT log 10 ( 3)P ROPAGATE 7 NuLib 4)S CATTER AND A BSORB 5)C ALCULATE : 6 • T IMESCALES ε σ scat σ abs • A NNIHILATION R ATES R scat R ann R emit 5 Open-source ! data: Metzger & Fernandez (2014)
SEDONU + NULIB g/cm 3 ) 8 EOS 1)T AKE F LUID S NAPSHOT ρ T Y e E ν 𝜍 2)E MIT log 10 ( 3)P ROPAGATE 7 NuLib 4)S CATTER AND A BSORB 5)C ALCULATE : 6 • T IMESCALES ε σ scat σ abs • A NNIHILATION R ATES R scat R ann R emit 5 Open-source ! data: Metzger & Fernandez (2014)
SEDONU + NULIB g/cm 3 ) 8 EOS 1)T AKE F LUID S NAPSHOT ρ T Y e E ν 𝜍 2)E MIT log 10 ( 3)P ROPAGATE 7 NuLib 4)S CATTER AND A BSORB 5)C ALCULATE : 6 • T IMESCALES ε σ scat σ abs • A NNIHILATION R ATES R scat R ann R emit 5 Open-source ! data: Metzger & Fernandez (2014)
HOW DO NEUTRINOS LOOK?
ASYMMETRIC NEUTRINO RADIATION HMNS BH Special relativity beams and hardens neutrinos
ASYMMETRIC NEUTRINO RADIATION BH HMNS
SPECTRA BH HMNS Escape spectra are not quite blackbody.
WHAT DO NEUTRINOS DO?
HEATING/COOLING RATE 𝑆 𝜗 = 1 𝑒𝜗 𝜗 𝑒𝑢 Neutrinos cool equator And heat above disk
LEPTONIZATION RATE 𝑓 = 𝑒𝑍 𝑓 𝑆 𝑍 𝑒𝑢 Neutrinos raise Electron fraction
DOES LEAKAGE SUCK?
COMPARISON TO LEAKAGE 10 20 erg/g binding energy stronger outflows
COMPARISON TO LEAKAGE BH HMNS MC neutrinos escape more easily
COMPARISON TO LEAKAGE BH HMNS MC neutrinos escape more easily
CAN NEUTRINOS POWER A JET?
𝑒𝑅 + ~ 𝐽 1 − cos 𝜄 2 𝑒𝐹 𝑒 𝐽 𝐹 + 𝐹 𝑒Ω 𝑒 𝐹 Ω ANNIHILATION Ruffert et al. (1997) g/cm 3 ) 8 𝜍 ν log 10 ( • S TRONG A NGULAR 𝜾 D EPENDENCE 7 𝜉 • A LL SPECIES 6 PARTICIPATE 5 data: Metzger & Fernandez (2014)
ANNIHILATION • LARGE POLAR SPECIFIC HEATING 2 • 3 × 10 46 ERG IN BH JET 0 1 • 10 48 − 10 50 ERG REQUIRED 1 (L EE & R AMIREZ -R UIZ 2007) J ET IS UNLIKELY 2
ANNIHILATION • LARGE POLAR SPECIFIC HEATING 2 • 3 × 10 46 ERG IN BH JET • 2 × 10 48 ERG IN HMNS JET 0 1 • 10 48 − 10 50 ERG REQUIRED 1 (L EE & R AMIREZ -R UIZ 2007) J ET IS UNLIKELY 2
CONCLUSIONS • A NNIHILATION CANNOT DRIVE JET ( PROBABLY ) • L EAKAGE LACKS SPECTRAL AND ANGULAR EFFECTS • MC FASTER COOLING AND LEPTONIZATION • CAVEAT: NON - EQUILIBRIUM
CONCLUSIONS SELF-PROMOTION • A NNIHILATION CANNOT • S EE THE P APER ! DRIVE JET ( PROBABLY ) AR X IV : 1507.03606 • • L EAKAGE LACKS SPECTRAL • S EE THE C ODE ! AND ANGULAR EFFECTS • BITBUCKET . ORG / SRICHERS / SEDONU • MC FASTER COOLING AND LEPTONIZATION • S EE THE P ERSON ! • TAPIR . CALTECH . EDU /~ SRICHERS • CAVEAT: NON - EQUILIBRIUM
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