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Population III Binary Black Holes: Effects of Convective Overshooting on Formation of GW190521
Ataru Tanikawa, Tomoya Kinugawa, Takashi Yoshida +2
GW190521 is a merger of two black holes (BHs), wherein at least one BH lies within the pair-instability (PI) mass gap, and it is difficult to form because of the effects of PI supe…
Formation of Binary Black Holes Similar to GW190521 with a Total Mass of from Population III Binary Star Evolution
Tomoya Kinugawa, Takashi Nakamura, Hiroyuki Nakano
In the case of zero-metal (population III or Pop III) stars, we show that the total mass of binary black holes from binary Pop III star evolution can be , whi…
Merger rate density of Population III binary black holes below, above, and in the pair-instability mass gap
Ataru Tanikawa, Hajime Susa, Takashi Yoshida +2
We present the merger rate density of Population (Pop.) III binary black holes (BHs) by means of a widely-used binary population synthesis code BSE with extensions to very massive…
Formation of mass gap compact object and black hole binary from Population III stars
Tomoya Kinugawa, Takashi Nakamura, Hiroyuki Nakano
We performed population synthesis simulations of Population III binary stars with Maxwellian kick velocity distribution when MGCOs (Mass Gap Compact Objects with mass 2--5$\,M_{\od…
Chirp Mass and Spin of Binary Black Holes from First Star Remnants
Tomoya Kinugawa, Takashi Nakamura, Hiroyuki Nakano
We performed Population III (Pop III) binary evolution by using population synthesis simulations for seven different models. We found that Pop III binaries tend to be binary black…