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In a recent paper, we have studied the Teukolsky equations for fermions withmass $m_e\neq 0$ and rotating black hole of mass $M$. There, we have studiedtwo cases: $\tilde{m}_e=m_e\,M^{-1}\ll 1$ and $a\omega\ll 1$; $\tilde{m}_e\ll1$ and $a\omega \gtrsim 1$. Here we study the two remaining case case in which$\tilde{m}_e\gtrsim 1$ and $a\omega\ll 1$ using a semi-analytical approach and$\tilde{m}_e\gtrsim 1$ and $a\omega\gtrsim 1$ using a numerical approach. Thiscase could be of some interest for the study of the interactions of fermionswith small black holes, such as those formed in the last stages of the theHawking evaporation process.

Semi-analytical and numerical solutions to Teukolsky equations for large fermion mass over black hole mass ratio