1. A novel paradigm for short gamma-ray bursts with extended X-Rays
Status on
numerical simulations supporting or ruling out
A novel paradigm for short gamma-ray bursts with extended X-Rays
Sven Köppel
1. Project Meeting
ExaHype Research Council
Leibniz Supercomputing Centre (LRZ)
TUM, Garching bei München
March 04, 2015
This project has received funding from the European Union’s Horizon 2020 reserch and innovation programme under grant agreement No

2. Short Gamma Ray Bursts

3. Short Gamma Ray Bursts
Common models:

4. Short Gamma Ray Bursts Common models: 1. BH+Torus: Jet formation
Cannot sustain ~ 10⁴ sec afterglow
Image credit:

5. Short Gamma Ray Bursts Common models: 1. BH+Torus: Jet formation
2. Magnetar: Long lasting X-ray afterglow
Cannot sustain ~ 10⁴ sec afterglow
X-Rays precede burst, no X-rays afterwards.
Image credit:

6. A two-wind model for the SGRB
[Rezzolla, Kumar arXiv: ]

7. A two-wind model for the SGRB
[Rezzolla, Kumar arXiv: ]

8. A two-wind model for the SGRB
[Rezzolla, Kumar arXiv: ]

9. Numerical approach

10. Numerical approach Evolution: WhiskyTHC (no magnetic field)
Uniformly rotating ID: LORENE

11. Numerical approach: About the initial data generation
LORENE: Langage Objet pour la RElativité NumériquE
Consists of:
• Library (C++ classes)
• Codes (eg. rotstar, magstar, bin_bh, bin_ns_bh, …)
LORENEs numerics:
• Mostly 3D spherical grids
• Spectral bases
Import from LORENE into CACTUS:
• Interpolation of fields on cartesian grid („Export“)
Implementation was ready for:
✔ WhiskyMHD
✘ WhiskyTHC

12. Numerical approach Evolution: WhiskyTHC (no magnetic field)
Uniformly rotating ID: LORENE
Adding matter to the enthalpy field in LORENE
+ disk
enthalpy [c²]

13. Thank you for your attention
Sven Köppel
1. Project Meeting
ExaHype Research Council
Leibniz Supercomputing Centre (LRZ)
TUM, Garching bei München
March 04, 2015
This project has received funding from the European Union’s Horizon 2020 reserch and innovation programme under grant agreement No