Single-single gravitational-wave captures in globular clusters : Eccentric deci-Hertz sources observable by DECIGO and Tian-Qin
We study the formation rate of binary black hole mergers formed through gravitational-wave emission between unbound, single black holes in globular clusters. While the formation of these binaries in very dense systems such as galactic nuclei has been well studied, we show here that this process can operate in lower-density stellar systems as well, forming binaries at a rate similar to other propos