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Observations of Orbiting Hot Spots around Scalarized Reissner-Nordstr\"om Black Holes

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arxiv 2401.10905 v1 pith:3ANTLHZH submitted 2024-01-04 gr-qc

Yiqian Chen , Peng Wang , Haitang Yang This is my paper · ORCID
classification gr-qc
keywords blackholesspotsorbitingphotonspheresmultipleobservational
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This paper investigates the observational signatures of hot spots orbiting scalarized Reissner-Nordstr\"om black holes, which have been reported to possess multiple photon spheres. In contrast to the single-photon sphere case, hot spots orbiting black holes with two photon spheres produce additional image tracks in time integrated images capturing a complete orbit of hot spots. Notably, these newly observed patterns manifest as a distinct second-highest peak in temporal magnitudes when observed at low inclination angles. These findings offer promising observational probes for distinguishing black holes with multiple photon spheres from their single-photon sphere counterparts.

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  1. Spin-induced Scalarized Black Holes in Einstein-Maxwell-scalar Models

    gr-qc 2025-06 conditional novelty 6.0 of 10

    Spin-induced scalarized Kerr-Newman black holes are constructed numerically for negative coupling, and they coexist with stable, entropically favored Kerr-Newman black holes.

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