2nd New Horizons for Psi Workshop

Linear stability of dyonic black holes in U(1) gauge-invariant scalar-vector-tensor theories

27 Aug 2026, 15:15

15m

Parallel Session B

Speaker

Mr Shunta Nishimura (Department of Physics, Faculty of Science Tokyo University of Science, Japan)

Description

We investigate the linear stability of static, spherically symmetric dyonic black hole solutions carrying both electric and magnetic charges in the U(1) gauge-invariant scalar-vector-tensor theory [1]. In the limit of vanishing magnetic charge, our framework reproduces the results of previous studies [2,3]. With appropriate choices of the interaction functions, it also encompasses the theoretical setup considered in Ref. [4]. On the other hand, the recently discovered dyonic hairy black hole solutions [5] are not covered by the frameworks developed in the previous studies and can therefore be analyzed for the first time within our framework. In particular, we focus on higher-order interactions and clarify the effects of the magnetic charge on the stability conditions.

[1] L. Heisenberg, JCAP 10, 054 (2018), arXiv:1801.01523 [gr-qc].
[2] L. Heisenberg, R. Kase, and S. Tsujikawa, Phys. Rev. D 97, 124043 (2018), arXiv:1804.00535 [gr-qc].
[3] C. Zhang and R. Kase, Phys. Rev. D 110, 044047 (2024), arXiv:2404.11910 [gr-qc].
[4] K. Taniguchi, S. Nishimura, N. Tsukamoto, and R. Kase, Phys. Rev. D 112, 124043 (2025), arXiv:2504.21279 [gr-qc].
[5] M. Kitagawa, N. Tsukamoto, and R. Kase, arXiv:2603.04884 [gr-qc].