Gravitational Radiation from Standing Accretion Shock Instability in Core-Collapse Supernovae

摘要: We present the results of numerical experiments in which we study how asphericities induced by growth standing accretion shock instability (SASI) produce gravitational waveforms postbounce phase core-collapse supernovae. To obtain neutrino-driven explosions, parameterize neutrino fluxes emitted from central proto-neutron star and approximate transfer a light-bulb scheme. find that due to anisotropic emissions show monotonic increase with time, whose amplitudes are up 2 orders magnitude larger than those convective matter motions outside stars. point out begin become when SASI enters nonlinear phase, deformation shocks anisotropy large. From spectrum analysis waveforms, neutrinos dominant over at frequencies below ~100 Hz, should be within detection limits next-generation detectors such as LCGT advanced LIGO for supernova 10 kpc. As contribution wave background, this source could above ~1 Hz primordial backgrounds but, unfortunately, invisible proposed space-based detectors.