SIMBAD references

The formation rate of a close binary consisting of a super-massive black hole and a compact object (presumably a white dwarf) in galactic cusps is calculated with the help of the so-called loss cone approximation. For a power-law cusp of radius r_a, the black hole mass M ∼ 10 ⁶ M_☉ , and the fraction of the compact objects δ∼ 0.1, this rate {formmu3}. The function K ( p) depends on parameter p determining the cusp profile, and for the standard cusp profiles with p = 1/4, K ( p) ∼ 2. We estimate the probability Pr of finding of a compact object orbiting around a black hole with the period P in one particular galaxy to be Pr ∼ 10 ^–7 [( P/10 ³ s)/( M/10 ⁶ M_☉)] ^8/3 [( M/10 ⁶ M_☉)/( r_a/1 pc)] ^3/2. The object with the period P ∼ 10 ³ s emits gravitational waves with amplitude sufficient to be detected by the LISA-type gravitational wave antenna from the distance ∼10³ Mpc. Based on estimates of masses of super-massive black holes in nearby galaxies, we speculate that LISA would detect several such events during its mission.