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Formation of mass gap compact object and black hole binary from Population III stars
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abstract
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$\,M_{\odot}$) are formed. We found that for eight kick velocity dispersion models of $\sigma_{\rm k}=0$--$500$ km/s, the mean mass of black hole (BH)-MGCO binary is $\sim (30 \,M_\odot,\,2.6 \,M_\odot)$. In numerical data of our simulations, we found the existence of BH-MGCO binary with mass $(22.9 \,M_\odot,\,2.5 \,M_\odot)$ which looks like GW190814.
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Constraining Population III stellar demographics with next-generation gravitational-wave observatories
A simulation study shows that one year of Cosmic Explorer and Einstein Telescope data could separate Population III black-hole mergers from ordinary ones and constrain the Population III initial mass function slope an...
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