6 papers
Exploring Physics beyond the Standard Model from kHz-Gravitational-Wave Signals of Core-Collapse Supernovae
Kei Kotake, Takami Kuroda
Recent advances in multidimensional modeling of core-collapse supernovae (CCSNe) have enabled detailed predictions of high-frequency gravitational-wave (GW) signals, offering a new…
Rotation-induced Relaxation of Supernova Constraints on Axionlike Particles
Tsurugi Takata, Kanji Mori, Ko Nakamura +1
We study how rotation modifies the constraints on MeV-scale axion-like particles (ALPs) coupled to photons derived from SN 1987A. We constrain the ALP parameter space based on both…
Circular polarization of gravitational waves from magnetorotational supernovae
Shota Shibagaki, Tomoya Takiwaki, Kei Kotake +2
Context. Gravitational waves (GWs) provide a unique probe of the explosion mechanism of massive stars and the evolution of nascent proto-neutron stars (PNSs). Magnetorotational exp…
The diffuse supernova neutrino background: an update with modern population synthesis and core-collapse simulations
Cecilia Lunardini, Tomoya Takiwaki, Tomoya Kinugawa +2
We present a new, state-of-the-art computation of the Diffuse Supernova Neutrino Background (DSNB), where we use neutrino spectra from multi-dimensional, multi-second core collapse…
Three-dimensional core-collapse supernova models with phenomenological treatment of neutrino flavor conversions
Kanji Mori, Tomoya Takiwaki, Kei Kotake +1
We perform three-dimensional supernova simulations with a phenomenological treatment of neutrino flavor conversions. We show that the explosion energy can increase to as high as ~1…
Three-dimensional Magneto-hydrodynamic Simulations of Core-collapse Supernovae: I. Hydrodynamic evolution and protoneutron star properties
Ko Nakamura, Tomoya Takiwaki, Jin Matsumoto +1
We present results from three-dimensional, magnetohydrodynamic, core-collapse simulations of sixteen progenitors following until 0.5 s after bounce. We use non-rotating solar-metal…