3D Long-time Core-Collapse Supernova Simulations

Annop Wongwathanarat

Ewald Müller

Hans-Thomas Janka

Max-Planck-Institutfür Astrophysik

Astrophysical Big Bang Laboratory

18th Workshop on Nuclear Astrophysics

Victor Utrobin

Introduction

Figure from Janka et al. (2012)

core-collapse and bounce

Explosion >>> 1.3 s post bounce

Stellar evolution model

1D

3D

1.25 day after explosions

Light curves calculations

1D

State-of-the-art long-time simulations

PROMETHEUS-HOTB

PROMETHEUS-HOTB + Yin-Yang grid

CRAB Lagrangian radiation hydrodynamics

Explore 4 progenitors, varying explosion energies

shock propagates according to blast wave solution (Sedov, 1959)

accelerates when ρr3 decreases, and vice versa

Shock dynamics

Woosley&Weaver(1995) RSG, W15

Limongi+ (2000)RSG, L15

Shigeyama&Nomoto (1990) BSG, N20

Woosley+ (1988) BSG, B15

Nickel-rich ejecta at shock breakout

Results

RSG model

Shock strongly accelerates --> RTI fingers stretch --> Reverse shock forms --> RTI fingers collide with

Reverse shock

at He/H interface

meet reverse shock

N20 model

Shock accelerates briefly --> Reverse shock forms --> Slow nickel bubbles collide with reverse shock and

flattened

at He/H interface

meet reverse shock

B15 model

at C+O/He interface

at He/H interface

Significant growth of RTIs --> fragmentation of nickel bubbles

B15 model

Shock accelerates briefly --> Reverse shock forms --> Fast nickel fingers ahead of reverse shock !!!

at He/H interface

meet reverse shock

B15 model

Fast nickel fingers stretch --> inner part of ejecta trapped by reverse shock

meet reverse shock

shock breakout

N20 BSG modelNickel too slow

at He/H interface

meet reverse shockShock too fast

RSG model

Explosion vs. late-time asymmetries

clear correlation

not so clear??

Early vs. late morphology

Conclusion I

- evolution of early-time asymmetries associated with explosion mechanism depends on complex interplays between the asymmetries and the SN shock

- SN shock dynamics connects to the density structure of the progenitor star

- Density structure of He shell and He/H interface are very important in determining the fate of heavy clumps

SN1987A

Woosley et al. (1988)

Shigeyama & Nomoto (1990)

Woosley (2007)

Woosley et al. (1997)

~ 3700 km/s < 2000 km/s

Light Curves of SN1987A

B15, N20, W20, W18

B15 model reproduce the dome of light curve

Utrobin et al. (2015)

and normal IIP

See Victor’s talk on Friday

Conclusion II

- performing 3D long-time CCSNe simulations

- extending simulations to later phases, connecting SN ---> SNR

- working towards comparison with observations

Development of a new high-order finite-volume hydrodynamic code for

astrophysical applications

Annop Wongwathanarat

Hannes Grimm-Strele

Ewald Müller

Max-Planck-Institutfür Astrophysik

Astrophysical Big Bang Laboratory

18th Workshop on Nuclear Astrophysics

An Apsara is a female spirit of the clouds and water in Hindu mythology.Apsaras are said to be able to change their shape at will.

(figure from wikipedia)

Submitted to A&A

How apsaras were born ??

Vishnu

Asuras

Devas

Suvarnabhumi international airport, Bangkok

Ocean of milk

Mount Mandara

Ceremony to obtain the nectar of immortality

Kurma (Vishnu’s avartar)

Suvarnabhumi international airport, Bangkok

Vasuki (king of serpent)

How apsaras were born ??

An Apsara is a female spirit of the clouds and water in Hindu mythology.Apsaras are said to be able to change their shape at will.

(figure from wikipedia)

Mapped grid technique

Credit: http://www.innovative-cfd.com/cfd-grid.html

Non-uniform grid in physical space is mapped to equidistant Cartesian grid in computational space

Mapped grid technique

Define one-to-one mapping function

Three main references

MPI+OpenMP parallelized

Testing the code

Linear acoustic wave

Non-linear terms intervene

Testing the code

Linear acoustic wave

Self convergence

Failure of Roe type flux

APSARA can capture low-mach number flows better

Conclusion III

- Developing high-order hydro code named APSARA

- Will be able to work on a singularity-free mesh in spherical geometry

- Will capture low-mach number flows more accurately

Future development

Single block circular domain

Low quality grid cells along diagonals

Mapped multi-block grid