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Bardeen-Dirac Stars in AdS Spacetime

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arxiv 2409.14402 v1 pith:7STNWCZ3 submitted 2024-09-22 gr-qc

Bardeen-Dirac Stars in AdS Spacetime

Xiao-Yu Zhang , Li Zhao , Yong-Qiang Wang This is my paper
classification gr-qc
keywords spacetimebdssbardeen-diracfbdssstarschargeconstantcosmological
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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In this paper, we construct a static spherical symmetric Bardeen-Dirac Stars (BDSs) in the four-dimensional Anti-de Sitter (AdS) spacetime, which consists of the electromagnetic field and Dirac field coupled to gravity. We investigate the ADM mass, Noether charge and light rings of BDSs in AdS spacetime. In asymptotically Minkowski spacetime, the maximum frequency of BDSs is one. However, we observe that the maximum frequency of BDSs increases as the cosmological constant decreases in AdS spacetime. Additionally, BDSs can exhibit extreme behavior at low frequencies, refer to as Frozen Bardeen-Dirac stars (FBDSs) in AdS spacetime. FBDSs have a critical event horizon, where the metric function gtt is very close to zero. The matter is entirely encapsulated by this critical horizon, highly concentrated within it. When the magnetic charge is fixed, the FBDSs gradually disappear as the cosmological constant decreases.

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Cited by 2 Pith papers

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

  1. Scalarization of Bardeen spacetime

    gr-qc 2025-09 conditional novelty 5.0

    For scalarization of the full Bardeen spacetime, small magnetic charges give the usual smooth scalarization threshold, while large charges end in a 'frozen' horizonless scalarized state rather than a Bardeen black hole.

  2. Light Rings, Accretion Disks and Shadows of Hayward Boson Stars

    gr-qc 2025-07 unverdicted novelty 5.0

    Numerical construction of Hayward boson stars shows that frozen states produce Schwarzschild-like shadows with no extra photon rings while non-frozen states show multiple photon rings inside the shadow.