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gr-qc2026
Exact Solution of the Non-minimally Coupled Klein-Gordon Equation in the Schwarzschild Star
Reynan A. Dulinayan, Kevin T. Grosvenor
We present for the first time the exact solution of the massive Klein-Gordon equation in the Schwarzschild star (perfect-fluid, uniform-density, spherically-symmetric star), includ…
gr-qc2025
Exact Regions of Superradiant Instability of Kerr-Newman Black Holes and Massive Scalar Fields
John Adrian B. Baybay, Kevin T. Grosvenor
We investigate the superradiant instability of Kerr-Newman black holes in the presence of a massive, charged scalar field using the Vieira-Bezerra-Kokkotas (VBK) method. We study t…