Oblique Shock Breakout in Supernovae and Gamma-Ray Bursts: II. Numerical Solutions For Non-Relativistic Pattern Speeds
arXiv:1405.7041 · doi:10.1088/0004-637X/790/1/71
Abstract
Non-spherical explosions develop non-radial flows as the pattern of shock emergence progresses across the stellar surface. In supernovae these flows can limit ejecta speeds, stifle shock breakout emission, and cause collisions outside the star. Similar phenomena occur in stellar and planetary collisions, tidal disruption events, accretion-induced collapses, and propagating detonations. We present two-dimensional, nested-grid Athena simulations of non-radial shock emergence in a frame comoving with the breakout pattern, focusing on the adiabatic, non-relativistic limit in a plane stratified envelope. We set boundary conditions using a known self-similar solution and explore the role of box size and resolution on the result. The shock front curves toward the stellar surface, and exhibits a kink from which weak discontinuities originate. Flow around the point of shock emergence is neither perfectly steady nor self-similar. Waves and vortices, which are not predominantly due to grid effects, emanate from this region. The post-shock flow is deflected along the stellar surface, and its pressure disturbs the stellar atmosphere upstream of the emerging shock. We use the numerical results and their analytical limits to predict the effects of radiation transfer and gravity, which are not included in our simulations.
arXiv comment15 pages, 12 figures, submitted to ApJ
References in corpus (13)
- Athena: A New Code for Astrophysical MHD
- The Expulsion of Stellar Envelopes in Core-Collapse Supernovae
- Gamma-Ray Bursts and Type Ic Supernovae: SN 1998bw
- What Can the Accretion Induced Collapse of White Dwarfs Really Explain?
- Trans-Relativistic Blast Waves in Supernovae as Gamma-Ray Burst Progenitors
- Fast radiation mediated shocks and supernova shock breakouts
- Three-Dimensional Simulations of Tidally Disrupted Solar-Type Stars and the Observational Signatures of Shock Breakout
- A Model for the 19th Century Eruption of Eta Carinae: CSM Interaction Like a Scaled-Down Type IIn Supernova
- Oblique Shock Breakout in Supernovae and Gamma-Ray Bursts: I. Dynamics and Observational Implications
- Laterally Propagating Detonations in Thin Helium Layers on Accreting White Dwarfs
- Zero Impact Parameter White Dwarf Collisions in FLASH
- Shock Emergence in Supernovae: Limiting Cases and Accurate Approximations
- Explosive Disruption of Polytropes: a One Dimensional Hydrodynamic Calculation
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- Ellipsars: Ring-like explosions from flattened stars
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