TURBULENT MAGNETIC FIELD AMPLIFICATION FROM SPIRAL SASI MODES: IMPLICATIONS FOR CORE-COLLAPSE SUPERNOVAE AND PROTO-NEUTRON STAR MAGNETIZATION

Journal Article · Sun May 20 04:00:00 EDT 2012 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/751/1/26· OSTI ID:22037257

Endeve, Eirik; Mezzacappa, Anthony ^[1]; Cardall, Christian Y; Budiardja, Reuben D ^[2]; Beck, Samuel W; Bejnood, Alborz ^[3]; Toedte, Ross J ^[4]

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1. Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6354 (United States)
2. Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6354 (United States)
3. Joint Institute for Heavy Ion Research, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6374 (United States)
4. National Center for Computational Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6354 (United States)

We extend our investigation of magnetic field evolution in three-dimensional flows driven by the stationary accretion shock instability (SASI) with a suite of higher-resolution idealized models of the post-bounce core-collapse supernova environment. Our magnetohydrodynamic simulations vary in initial magnetic field strength, rotation rate, and grid resolution. Vigorous SASI-driven turbulence inside the shock amplifies magnetic fields exponentially; but while the amplified fields reduce the kinetic energy of small-scale flows, they do not seem to affect the global shock dynamics. The growth rate and final magnitude of the magnetic energy are very sensitive to grid resolution, and both are underestimated by the simulations. Nevertheless, our simulations suggest that neutron star magnetic fields exceeding 10{sup 14} G can result from dynamics driven by the SASI, even for non-rotating progenitors.

• OSTI ID: 22037257
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 751; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
AMPLIFICATION
ASTRONOMY
ASTROPHYSICS
COMPUTERIZED SIMULATION
GRAVITATIONAL COLLAPSE
INSTABILITY
KINETIC ENERGY
MAGNETIC FIELDS
MAGNETIZATION
MAGNETOHYDRODYNAMICS
NEUTRON STARS
RESOLUTION
ROTATION
SUPERNOVAE
THREE-DIMENSIONAL CALCULATIONS
TURBULENCE