Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gravitational field of a slowly rotating black hole with phantom global
  monopole   We present a slowly rotating black hole with phantom global monopole by
solving Einstein's field equation and find that presence of global monopole
changes the structure of black hole. The metric coefficient $g_{t\phi}$
contains hypergeometric function of the polar coordinate $r$, which is more
complex than that in the usual slowly rotating black hole. The energy scale of
symmetry breaking $\eta$ affects the black hole horizon and a deficit solid
angle. Especially, the solid angle is surplus rather than deficit for a black
hole with the phantom global monopole. We also study the correction originating
from the global monopole to the angular velocity of the horizon $\Omega_H$, the
Kepler's third law, the innermost stable circular orbit and the radiative
efficiency $\epsilon$ in the thin accretion disk model. Our results also show
that for the phantom black hole the radiative efficiency $\epsilon$ is positive
only for the case $\eta\leq \eta_c$. The threshold value $\eta_c$ increases
with the rotation parameter $a$.

14
The categories of this paper are: math-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph
16
The categories of this paper are: stat
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
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The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
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The categories of this paper are: eess
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an