A mini pulsar timing array inside a globular cluster could detect intermediate-mass black hole binaries with mass ratios above about 0.1 via microsecond gravitational-wave timing residuals.
Mergers of globular clusters in the Galactic disc: intermediate mass black hole coalescence and implications for gravitational waves detection
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abstract
We propose a new formation channel for intermediate mass black hole (IMBH) binaries via globular cluster collisions in the Galactic disc. Using numerical simulations, we show that the IMBHs form a tight binary that enters the gravitational waves (GWs) emission dominated regime driven by stellar interactions, and ultimately merge in $\lesssim 0.5$ Gyr. These events are clearly audible to LISA and can be associated with electromagnetic emission during the last evolutionary stages. During their orbital evolution, the IMBHs produce runaway stars comparable with GAIA and LAMOST observations.
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Detecting Intermediate-mass Black Holes Using Miniature Pulsar Timing Arrays in Globular Clusters
A mini pulsar timing array inside a globular cluster could detect intermediate-mass black hole binaries with mass ratios above about 0.1 via microsecond gravitational-wave timing residuals.