paper

Inspiral into Gargantua

arXiv:1603.01221 · doi:10.1088/0264-9381/33/15/155002

Abstract

We model the inspiral of a compact object into a more massive black hole rotating very near the theoretical maximum. We find that once the body enters the near-horizon regime the gravitational radiation is characterized by a constant frequency, equal to (twice) the horizon frequency, with an exponentially damped profile. This contrasts with the usual "chirping" behavior and, if detected, would constitute a "smoking gun" for a near-extremal black hole in nature.

10 pages, 5 figures, updated to journal version

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