Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Rossby Wave Instability in accretion discs surrounding spinning
  black holes   We have performed general relativistic hydrodynamics (GRHD) simulations of 2D
discs orbiting around spinning black holes and prone to the Rossby Wave
Instability (RWI). We show that the RWI can develop at any location in the disc
and for any spin parameter. After recovering the overall patterns of the
instability in this general relativistic context, we have analysed its
development and identified some modifications induced by the combined effects
of the relativistic rotational profile of the disc and local time dilatation
that affects the propagation of waves in the disc. We have found in particular
that the saturation level of the instability increases significantly when RWI
occurs in the very close vicinity of fast-rotating black holes where general
relativistic effects are strong. Such finding suggests that even more strongly
than in the case of Schwarzschild black-hole, it is necessary to complement
such GRHD simulations with a full GR ray-tracing processing in order to provide
synthetic observations of the disc in the distant observer frame.

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The categories of this paper are: physics
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The categories of this paper are: stat
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The categories of this paper are: cmp-lg
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: supr-con
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The categories of this paper are: funct-an
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The categories of this paper are: quant-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-th
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The categories of this paper are: math
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex
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The categories of this paper are: eess