Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quasi-periodic oscillations from relativistic hydrodynamical slender
  tori   We simulate an oscillating purely hydrodynamical torus with constant specific
angular mo- mentum around a Schwarzschild black hole. The goal is to search for
quasi-periodic oscil- lations (QPOs) in the light curve of the torus. The
initial torus setup is subjected to radial, vertical and diagonal (combination
of radial and vertical) velocity perturbations. The hydro- dynamical
simulations are performed using the general relativistic magnetohydrodynamics
code Cosmos++ and ray-traced using the GYOTO code. We found that a horizontal
velocity perturbation triggers the radial and plus modes, while a vertical
velocity perturbation trig- gers the vertical and X modes. The diagonal
perturbation gives a combination of the modes triggered in the radial and
vertical perturbations.

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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ph
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The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
2
The categories of this paper are: math
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The categories of this paper are: acc-phys
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The categories of this paper are: econ
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The categories of this paper are: q-alg
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The categories of this paper are: q-bio
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex