Takashi J. Moriya

TL;DR: In this paper , the effects of the interaction between Type Ia supernova ejecta and their circumstellar wind on the photometric properties of supernovae were investigated, and it was shown that a hydrogen-rich, dense, and extended circumstellar matter (CSM) is formed by the steady mass loss of their progenitor systems.

TL;DR: In this paper , the Nancy Grace Roman Space Telescope (Roman) was used to detect kilonovae in the LIGO-Virgo-KAGRA fifth (or about 4-21 in during the sixth) observing run.

TL;DR: In this article, the authors investigated how interaction-powered transients are distributed in the peak bolometric luminosity vs the rise time phase space, taking the advantage of less time-consuming one-dimensional simulations with spherical symmetry, calculated more than 500 models with different circumstellar mass and radius, ejecta mass and energy, and chemical compositions.

TL;DR: In this paper, the authors present a follow-up spectroscopy for 13 photometric candidates of extremely metal poor galaxies (EMPGs) selected by a machine-learning technique applied to the deep (~26 AB mag) optical and wide-area (~500 deg^2) Subaru imaging data in the EMPRESS survey.

TL;DR: In this article, a series of three-dimensional hydrodynamical simulations was performed to investigate how CCSN explosions affect their binary companion, and they found that the amount of removed stellar mass, the resulting impact velocity, and the chemical contamination of the companion that results from the impact of the SN ejecta, strongly increases with decreasing binary separation and increasing explosion energy.