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1D and 2D supernova simulations for stars between 11 and 25 solar masses are presented, making use of the Prometheus/Vertex neutrino-hydrodynamics code, which employs a full spectral treatment of the neutrino transport. Multi-dimensional…

天体物理学 · 物理学 2009-11-11 R. Buras , H. -Th. Janka , M. Rampp , K. Kifonidis

We present the first successful simulation of a neutrino-driven supernova explosion in three dimensions (3D), using the Prometheus-Vertex code with an axis-free Yin-Yang grid and a sophisticated treatment of three-flavor, energy-dependent…

太阳与恒星天体物理 · 物理学 2015-05-01 Tobias Melson , Hans-Thomas Janka , Andreas Marek

Non-ideal magnetohydrodynamics (MHD) is the dominant process. We investigate the effect of magnetic fields (ideal and non-ideal) and turbulence (sub- and transsonic) on the formation of protostars by following the gravitational collapse of…

太阳与恒星天体物理 · 物理学 2020-06-03 James Wurster , Benjamin T. Lewis

We present results of 2D hydrodynamic simulations of stellar core collapse, which confirm that the neutrino-heating mechanism remains viable for the explosion of a wider mass range of supernova progenitors with iron cores. We used an…

天体物理学 · 物理学 2009-06-23 A. Marek , H. Th. Janka

After the initiation of the explosion of core-collapse supernovae, neutrinos emitted from the nascent neutron star drive a supersonic baryonic outflow. This neutrino-driven wind interacts with the more slowly moving, earlier supernova…

太阳与恒星天体物理 · 物理学 2015-05-19 A. Arcones , H. -T. Janka

Surface magnetic fields have a strong impact on stellar mass loss and rotation and, as a consequence, on the evolution of massive stars. In this work we study the influence of an evolving dipolar surface fossil magnetic field with an…

太阳与恒星天体物理 · 物理学 2019-03-27 Z. Keszthelyi , G. Meynet , C. Georgy , G. A. Wade , V. Petit , A. David-Uraz

The overwhelming evidence that the core collapse supernova mechanism is inherently multidimensional, the complexity of the physical processes involved, and the increasing evidence from simulations that the explosion is marginal presents…

天体物理学 · 物理学 2009-11-13 S. W. Bruenn , C. J. Dirk , A. Mezzacappa , J. C. Hayes , J. M. Blondin , W. R. Hix , O. E. B. Messer

We report here on recent progress in understanding the birth conditions of neutron stars and the way how supernovae explode. More sophisticated numerical models have led to the discovery of new phenomena in the supernova core, for example a…

天体物理学 · 物理学 2009-06-23 H. -Th. Janka , A. Marek , B. Mueller , L. Scheck

This article presents the study of the effects of magnetic fields on non-distributed nuclear burning fronts as a possible solution to a fundamental problem for the thermonuclear explosion of a Chandrasekhar mass ($M_{Ch}$) white dwarf (WD),…

太阳与恒星天体物理 · 物理学 2018-05-16 Boyan Hristov , David C. Collins , Peter Hoeflich , Charles A. Weatherford , Tiara R. Diamond

We report results from a series of three-dimensional (3D) rotational core-collapse simulations for $11.2$ and 27 $M_{/odot}$ stars employing neutrino transport scheme by the isotropic diffusion source approximation. By changing the initial…

高能天体物理现象 · 物理学 2016-07-13 Tomoya Takiwaki , Kei Kotake , Yudai Suwa

The magnetohydrodynamics (MHD) is modified to incorporate the parity violation in the Standard Model leading to a new instability of magnetic fields in the electroweak plasma in the presence of nonzero neutrino asymmetries. The main…

高能物理 - 唯象学 · 物理学 2014-05-08 Maxim Dvornikov , Victor B. Semikoz

We investigate the effect of non-ideal magnetohydrodynamics (MHD) on the formation of binary stars using a suite of three-dimensional smoothed particle magnetohydrodynamics simulations of the gravitational collapse of one solar mass,…

太阳与恒星天体物理 · 物理学 2016-12-08 James Wurster , Daniel J. Price , Matthew R. Bate

Based on the new findings on the turbulent dynamo in \citet{XL16}, we examine the magnetic field amplification in the context of supernova remnants. Due to the strong ion-neutral collisional damping in the weakly-ionized interstellar…

高能天体物理现象 · 物理学 2017-12-13 Siyao Xu , Alex Lazarian

A toy model of the post-shock region of core-collapse supernovae is used to study the non-linear development of turbulent motions driven by convection in the presence of advection. Our numerical simulations indicate that buoyant…

太阳与恒星天体物理 · 物理学 2018-07-18 Rémi Kazeroni , Brendan K. Krueger , Jérôme Guilet , Thierry Foglizzo , Daniel Pomarède

Magnetic fields permeate the Universe on all scales and play a key role during star formation. We study the evolution of magnetic fields around a massive metal-free (Population III) star at $z \sim 15$ during the growth of its HII region…

星系天体物理 · 物理学 2016-08-03 Daegene Koh , John H. Wise

We propose the mean field dynamo model for the generation of strongest magnetic fields, $B\sim 10^{15}\,{\rm G}$, in a neutron star (NS) accounting for the chiral magnetic effect (CME) driven by the shock in a supernova (SN) progenitor of…

高能天体物理现象 · 物理学 2020-04-08 Maxim Dvornikov , V. B. Semikoz , D. D. Sokoloff

We study the impacts of magnetic field on the neutrino transport inside core-collapse supernovae (CCSNe). Magnetic field quantizes the momentum of electrons and positrons, resulting in the modification of weak-interaction cross sections and…

高能天体物理现象 · 物理学 2024-05-21 Yudong Luo , Shuai Zha , Toshitaka Kajino

Supernova theory, numerical and analytic, has made remarkable progress in the past decade. This progress was made possible by more sophisticated simulation tools, especially for neutrino transport, improved microphysics, and deeper insights…

太阳与恒星天体物理 · 物理学 2015-06-05 H. -Thomas Janka

We present numerical simulations of driven magnetohydrodynamic (MHD) turbulence with weak/moderate imposed magnetic fields. The main goal is to clarify dynamics of magnetic field growth. We also investigate the effects of the imposed…

天体物理学 · 物理学 2011-02-11 J. Cho , E. Vishniac , A. Beresnyak , A. Lazarian , D. Ryu

By performing a series of two-dimensional, special relativistic magnetohydrodynamic (MHD) simulations, we study signatures of gravitational waves (GWs) in the magnetohydrodynamically-driven core-collapse supernovae. In order to extract the…

高能天体物理现象 · 物理学 2015-05-18 Tomoya Takiwaki , Kei Kotake