A slightly larger (3.3 solar masses vs 3 solar masses) black hole in a similar binary has been described in https://ui.adsabs.harvard.edu/abs/2019Sc...T/abstract and https://arxiv.org/abs/1806.02751
It seems to be about 3kpc away, though, currently outside the Terragen sphere.
Eta: both of these are classified as non-interacting black holes (I.e. no accretion disk), of which about 1,000 are estimated to be detectable by Gaia. So I’d guess maybe a dozen might be in the Terragen sphere.
It seems to be about 3kpc away, though, currently outside the Terragen sphere.
Eta: both of these are classified as non-interacting black holes (I.e. no accretion disk), of which about 1,000 are estimated to be detectable by Gaia. So I’d guess maybe a dozen might be in the Terragen sphere.
Selden