Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Shadow of charged black holes in Gauss-Bonnet gravity   In this paper, we investigate the effect of higher curvature corrections from
Gauss-Bonnet gravity on the shadow of charged black holes in both $AdS$ and
Minkowski spacetimes. The null geodesic equations are computed in $d=5$
spacetime dimensions by using the directions of symmetries and Hamilton-Jacobi
equation. With the null geodesics in hand, we then proceed to evaluate the
celestial coordinates ($\alpha, \beta$) and the radius $R_s$ of the black hole
shadow and represent it graphically. The effects of charge $Q$ of the black
hole and the Gauss-Bonnet parameter $\gamma$ on the radius of the shadow $R_s$
is studied in detail. It is observed that the Gauss-Bonnet parameter $\gamma$
affects the radius of the black hole shadow $R_s$ differently for the $AdS$
black hole spacetime in comparison to the black hole spacetime which is
asymptotically flat. In particular the radius of the black hole shadow
increases with increase in the Gauss-Bonnet parameter in case of the $AdS$
black hole spacetime and decreases in case of the asymptotically flat black
hole spacetime. We then introduce a plasma background in order to observe the
change in the silhouette of the black hole shadow due to a change in the
refractive index of the plasma medium. Finally, we study the effect of the
Gauss-Bonnet parameter $\gamma$ on the energy emission rate of the black hole
which depends on the black hole shadow radius and represent the results
graphically.

34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org