Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charged black-bounce spacetimes: Photon rings, shadows and observational
  appearances   The photon ring, shadow and observational appearance of the emission
originating near a charged black-bounce are investigated. Based on the geodesic
analysis, we determine the upper and lower limits of critical impact parameters
of a charged black-bounce. In particular, we find that the charged black-bounce
shares the same critical impact parameter with the Reissner-Nordst\"om black
hole. In addition, we classify the light trajectories coming from the region
near the charged black-bounce by utilizing the rays tracing procedure, and then
investigate the observational appearance of the emissions from a thin disk
accretion and a spherically symmetric infalling accretion. We reveal that a
large charge increases the observed intensity but decreases the apparent size
of shadows, and that the photon ring presents the intrinsic property of a
charged black-bounce, which is independent of the accretion models.

6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph