12 papers
Orbital Migration of Interacting Stellar Mass Black Holes in Disks around Supermassive Black Holes. III. Mass Distribution of Hierarchical Mergers
Katherine L. Gonglewski, Amy Secunda, Mordecai-Mark Mac Low +3
Active galactic nucleus (AGN) disks are a promising location for the formation of binary black holes (BBHs) that will merge on relatively short timescales and be detected by LIGO-V…
Non-LTE Ionization Modeling for Helium and Strontium in Neutron Star Merger Ejecta
Koya Chiba, Masaomi Tanaka, Shinya Wanajo +3
The material ejected from a binary neutron star merger produces "kilonova," a radioactively powered emission at ultraviolet, optical, and infrared wavelengths. The early-phase spec…
Lanthanide Impact on the Infra-Red Spectra of Nebular Phase Kilonovae
Quentin Pognan, Kyohei Kawaguchi, Shinya Wanajo +3
Nebular phase kilonovae (KNe) have significant infra-red (IR) emission thought to be mostly forbidden emission lines from rapid neutron capture (r-process) species in neutron star…
Collapse of rotating very massive stellar cores leading to a black hole and a massive disk as a source of gravitational waves
Masaru Shibata, Sho Fujibayashi
We derive models of rotating very massive stellar cores with mass -- which are marginally stable to the pair-unstable collapse, assuming that the core is…
Neutrino flavor instabilities in a binary neutron star merger remnant: Roles of a long-lived hypermassive neutron star
Hiroki Nagakura, Kohsuke Sumiyoshi, Sho Fujibayashi +2
Understanding the post-merger evolution of binary neutron star merger (BNSM) requires accurate modeling of neutrino transport and microphysics including neutrino flavor conversions…
Neutrino pair annihilation driven jets from black-hole torus systems
Kyohei Kawaguchi, Sho Fujibayashi, Masaru Shibata
We perform axisymmetric general relativistic radiation-viscous hydrodynamics simulations of black hole (BH)-torus systems with full Boltzmann Monte-Carlo neutrino transport to inve…