Journal ArticleDOI
Nonlinear evolution of the r-modes in neutron stars.
TLDR
The evolution of a neutron-star r-mode driven unstable by gravitational radiation is studied here using numerical solutions of the full nonlinear fluid equations to study the nonlinear evolution of the mode.Abstract:
The evolution of a neutron-star $r$-mode driven unstable by gravitational radiation is studied here using numerical solutions of the full nonlinear fluid equations. The dimensionless amplitude of the mode grows to order unity before strong shocks develop which quickly damp the mode. In this simulation the star loses about $40%$ of its initial angular momentum and $50%$ of its rotational kinetic energy before the mode is damped. The nonlinear evolution causes the fluid to develop strong differential rotation which is concentrated near the surface and poles of the star.read more
Citations
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Stellar Iron Core Collapse in 3+1 General Relativity and The Gravitational Wave Signature of Core-Collapse Supernovae
TL;DR: In this paper, the first ever calculations of rotating stellar iron core collapse in {3+1} general relativity were performed and analyzed using presupernova models from stellar evolutionary calculations and include a microphysical finite-temperature nuclear equation of state, an approximate scheme for electron capture during collapse and neutrino pressure effects.
Journal ArticleDOI
r-mode astronomy
Kostas D. Kokkotas,Kai Schwenzer +1 more
TL;DR: In this article, the authors discuss the chances to detect the continuous emission from r-mode oscillations in compact stars and study which properties of compact stars we can infer from such novel data.
Journal ArticleDOI
Bulk viscosity in 2SC quark matter
Mark G. Alford,Andreas Schmitt +1 more
TL;DR: In this paper, the bulk viscosity of three-flavour colour-superconducting quark matter originating from the non-leptonic process u + s? u + d is computed.
Journal ArticleDOI
Phase conversion dissipation in multicomponent compact stars
TL;DR: In this article, the authors proposed a mechanism for the damping of density oscillations in multicomponent compact stars, which is the periodic conversion between different phases induced by pressure oscillations.
Journal ArticleDOI
Harnessing billions of tasks for a scalable portable hydrodynamic simulation of the merger of two stars
Thomas Heller,Bryce Adelstein Lelbach,Kevin Huck,John Biddiscombe,Patricia Grubel,Alice Koniges,Matthias Kretz,Dominic Marcello,David Pfander,Adrian Serio,Juhan Frank,Geoffrey C. Clayton,Dirk Pflüger,David C. Eder,Hartmut Kaiser +14 more
TL;DR: A highly scalable demonstration of a portable asynchronous many-task programming model and runtime system applied to a grid-based adaptive mesh refinement hydrodynamic simulation of a double white dwarf merger with 14 levels of refinement that spans 17 orders of magnitude in astrophysical densities.