29 papers
Luminous Red Novae as shock-powered transients I: Electron-scattering wings and deviations from Case B
Albert Sneppen, Kenta Hotokezaka, Christopher M. Irwin
Luminous red novae (LRNe) are a class of optical transients resulting from the mergers of binary stars or common envelope events. The population displays heterogeneous light curves…
Evaluating KAGRA upgrade scenarios for multimessenger observations of binary neutron stars
Yuta Michimura, Soichiro Morisaki, Kenta Hotokezaka +1
The paper presents a fast method to assess how different KAGRA detector upgrades will affect the ability to locate binary neutron star mergers for multimessenger astronomy, compari…
A spectacular multi-wavelength transient associated with an off-axis relativistic jet
Delina Levine, Gregg Hallinan, Jean J. Somalwar +10
Many of the most luminous extragalactic transients originate from the accretion of material onto a black hole (BH) via core-collapse, stellar mergers, or the tidal disruption of a…
Subsolar-mass binary mergers of strange stars and neutron stars: gravitational waves and ejecta
Yong Gao, Ming-Zhe Han, Kenta Kiuchi +3
We present the first numerical-relativity simulations of subsolar-mass binary strange star (SS) mergers and compare with binary neutron star (NS) mergers across equations of state,…
The hydrodynamics of stratified ultra-relativistic outflows and the origin of GRB X-ray plateaus
Gilad Sadeh, Kenta Hotokezaka, Masaru Shibata
The origin of the X-ray plateau phase observed in a large fraction of gamma-ray burst afterglows remains debated. We present a novel analytic framework for the hydrodynamics of ult…
Heavy element dust explains the late-time spectra of kilonovae
Nanae Domoto, Kenta Hotokezaka, Daniel Kasen
Neutron star mergers are a leading site of -process, producing radioactively powered optical and infrared transients known as kilonovae. Observations of the kilonovae AT2017gfo,…