Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: C-metric with a conformally coupled scalar field in a magnetic universe   In Einstein-Maxwell gravity with a conformally coupled scalar field, the
black hole found by Bocharova, Bronnikov, Melnikov, and Bekenstein breaks when
embedded in the external magnetic field of the Melvin universe. The situation
improves in presence of acceleration, allowing one to build magnetised and
accelerating BBMB black hole with a thin membrane. But to overcome this and
others disadvantages of BBMB spacetimes, a new class of black holes, including
the rotating case, is proposed for the conformal matter coupling under
consideration.

23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci