2013

Gravitational Wave Signatures from Low-mode Spiral Instabilities in Rapidly Rotating Supernova Cores

Kuroda, Takami, Takiwaki, Tomoya, Kotake, Kei

Understand

We study properties of gravitational waves (GWs) from rotating core-collapse of a 15M_odot star by performing three-dimensional general-relativistic hydrodynamic simulations with an approximate neutrino transport.

  • By parametrically changing the precollapse angular momentum, we focus on the effects of rotation on the GW signatures in the early postbounce evolution.
  • Regarding three-flavor neutrino transport, we solve the energy-averaged set of radiation energy and momentum based on the Thorne's momentum formalism.
  • In addition to the gravitational quadrupole radiation from matter motions, we take into account GWs from anisotropic neutrino emission.

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