Pith. sign in

REVIEW 3 cited by

Shadows and photon spheres with spherical accretions in the four-dimensional Gauss-Bonnet black hole

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2004.12074 v4 pith:YCKBTQ32 submitted 2020-04-25 gr-qc hep-th

Xiao-Xiong Zeng , Hai-Qing Zhang , Hongbao Zhang This is my paper · ORCID
classification gr-qchep-th
keywords gauss-bonnetphotonshadowconstantsphereaccretionaccretionsblack
verification ladder T0 review T1 audit T2 compute T3 formal
0 comments
read the original abstract

We investigate the shadows and photon spheres of the four-dimensional Gauss-Bonnet black hole with the static and infalling spherical accretions. We show that for both cases, the shadow and photon sphere are always present. The radii of the shadow and photon sphere are independent of the profiles of accretion for a fixed Gauss-Bonnet constant, implying that the shadow is a signature of the spacetime geometry and it is hardly influenced by accretion in this case. Because of the Doppler effect, the shadow of the infalling accretion is found to be darker than that of the static one. We also investigate the effect of the Gauss-Bonnet constant on the shadow and photon sphere, and find that the larger the Gauss-Bonnet constant is, the smaller the radii of the shadow and photon sphere will be. In particular, the observed specific intensity increases with the increasing of the Gauss-Bonnet constant.

Discussion (0). Continue with ORCID to comment.

Forward citations

Cited by 3 Pith papers

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

  1. Observing the eye of the storm I: testing regular black holes with LVK and EHT observations

    gr-qc 2024-11 conditional novelty 5.0 of 10

    EHT shadow sizes and LIGO/Virgo/KAGRA inspiral waveforms allow only small values of the dimensionless regularity parameter ℓ in the Ghosh-Simpson-Visser regular black hole.

  2. 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...

  3. The Image of Scalar Hairy Black Holes with Asymmetric Potential

    gr-qc 2024-11 conditional novelty 4.0 of 10

    The optical appearance of a scalar hairy black hole with asymmetric potential is computed, and its shadow size is used to constrain the potential parameters with EHT observations.

Pith tools