Fig. 6: Evaluation of the stability of the superradiant cloud in the presence of an accretion disk. | Nature Communications

Fig. 6: Evaluation of the stability of the superradiant cloud in the presence of an accretion disk.

From: Searching for ultra-light bosons and constraining black hole spin distributions with stellar tidal disruption events

Fig. 6

Colored lines: perturbation estimator χ, defined in Eq. (11), for the mixings between different superradiant and decaying levels induced by a thin accretion disk with an mpert = 2 harmonic perturbation in its density profile, as specified by Eq. (13). Red and blue lines show the mixing of the \(\left|211\right. \rangle\) and \(\left|322\right. \rangle\) clouds with selected decaying levels. Colored regions: values of the gravitational parameter α for which the perturbation estimator χ > 1 for the aforementioned transitions, in which case the corresponding clouds are unstable against the disk perturbations.

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