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How does a Secular Instability Grow in a Hyperaccretion Flow?
Mariko Kimura, Shin Mineshige, Norita Kawanaka
Hyperaccretion flows with mass accretion rates far above the Eddington rate have an N-shaped equilibrium curve on the - plane (with and being surface dens…
Cosmic-Ray Hardenings in the Light of AMS-02
Yutaka Ohira, Norita Kawanaka, Kunihito Ioka
Recent precise observations of cosmic rays (CRs) by AMS-02 experiment clearly show (1) harder spectra of helium and carbon compared to protons by , and (2) concav…
Neutrino Flavor Ratios Modified by Cosmic Ray Secondary Acceleration
Norita Kawanaka, Kunihito Ioka
Acceleration of 's and 's modifies the flavor ratio at Earth (at astrophysical sources) of neutrinos produced by decay, , from () to $1:1.8:1.…
Vertical convection in neutrino-dominated accretion flows
Tong Liu, Wei-Min Gu, Norita Kawanaka +1
We present the effects of the vertical convection on the structure and luminosity of the neutrino-dominated accretion flow (NDAF) around a stellar-mass black hole in spherical coor…