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Constraint on the progenitor of binary black hole merger using Population III star formation channel
Masaki Iwaya, Tomoya Kinugawa, Hideyuki Tagoshi
The observations of gravitational waves have revealed the existence of black holes above . A variety of channels have been proposed as their origin, including the Popul…
Fate of supernova progenitors in massive binary systems
Tomoya Kinugawa, Shunsaku Horiuchi, Tomoya Takiwaki +1
How massive stars end their lives depends on the core mass, core angular momentum, and hydrogen envelopes at death. However, these key physical facets of stellar evolution can be s…
Mass Ratio of Binary Black Holes Determined from LIGO/Virgo Data Restricted to Small False Alarm Rate
Tomoya Kinugawa, Takashi Nakamura, Hiroyuki Nakano
We focus on gravitational-wave events of binary black-hole mergers up to the third observing run with the minimum false alarm rate smaller than . These even…
Merger Conditions of Population III Protostar Binaries
Takanobu Kirihara, Hajime Susa, Takashi Hosokawa +1
Massive close binary stars with extremely small separations have been observed, and they are possible progenitors of gravitational-wave sources. The evolution of massive binaries i…