Question

Formula to calculate the ringdown frequency of two black holes given their mass?

Answer 1

Is there a simple formula to approximately calculate the ringdown frequency of two black holes given that we know their masses?

Answer 2

$\huge{\mathfrak{HEYA\:MATE\:!!}}$

Answer...

There is no such formula BECAUSE we can't straight away find the ringdown frequency until we don't have any information about the angular momentum.

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