Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charged Perfect Fluid Cylindrical Gravitational Collapse   This paper is devoted to study the charged perfect fluid cylindrical
gravitational collapse. For this purpose, we find a new analytical solution of
the field equations for non-static cylindrically symmetric spacetime. We
discuss physical properties of the solution which predict gravitational
collapse. It is concluded that in the presence of electromagnetic field the
outgoing gravitational waves are absent. Further, it turns out that when
longitudinal length reduces to zero due to resultant action of gravity and
electromagnetic field, then the end state of the gravitational collapse is a
conical singularity. We also explore the smooth matching of the collapsing
cylindrical solution to a static cylindrically symmetric solution. In this
matching, we take a special choice of constant radius of the boundary surface.
We conclude that the gravitational and Coulomb forces of the system balance
each other.

12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an