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Echoes from Classical Black Holes

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arxiv 2112.14780 v1 pith:W7JYH6CR submitted 2021-12-29 hep-th gr-qc

Hyat Huang , Min-Yan Ou , Meng-Yun Lai , H. Lu This is my paper · ORCID
classification hep-thgr-qc
keywords blackechoesholesfrequencypeaksreleasedariseassociated
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We study echoes of free massless scalar from dyonic black holes in Einstein-Maxwell gravity extended with the quasi-topological electromagnetic term. These asymptotically-flat black holes all satisfy the dominant energy condition. We find that for suitable parameters, the effective potential can have double peaks and consequently echoes of quasinormal modes arise. In general the echo frequency associated with the initial wave packet released inside the two peaks is about twice the frequency of the one released outside.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. A new type of multi-branch periodic orbits in dyonic black holes

    gr-qc 2025-08 conditional novelty 7.0 of 10

    Dyonic black holes with non-monotonic metric functions support multiple geometrically distinct but topologically identical periodic orbits for the same rational label, plus bound orbits with energy above unity.

  2. Model-agnostic search of gravitational wave echoes in LVK data

    gr-qc 2025-12 conditional novelty 6.0 of 10

    A multi-detector phase-marginalized echo search finds no statistically significant long-lived quasinormal-mode echoes in GW150914, GW231226, and GW250114, and sets 90% upper limits on their network SNR and amplitude.

  3. Can we distinguish whether black holes have singularities or not through echoes and light rings?

    gr-qc 2025-05 conditional novelty 5.0 of 10

    In the Bardeen and Hayward black hole families, the singular type II branch can have two light rings and echo-like quasinormal signals, while regular black holes have one light ring.

  4. Gravitational Lensing by Black Holes in Einstein-nonlinear Electrodynamic Theories with Multiple Photon Spheres

    gr-qc 2025-07 conditional novelty 4.0 of 10

    In Einstein-nonlinear electrodynamic black holes, each effective potential peak that is taller than all peaks outside it yields a separate photon ring cluster in the lensed image, and triple-peak cases show three nest...

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