Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Axial perturbations of neutron stars with shift symmetric conformal
  coupling   In this present work, the axial quasi-normal modes of neutron stars, with a
shift symmetric conformal coupling, are studied for different realistic
equations of state. First, we derive the background equations in static and
spherically symmetric spacetime and then we solve them numerically by taking
into account the continuity and regularity conditions. Second, we extend our
calculus to the perturbed level where we derive the equations of motion as well
as the ghost and Laplacian instability. We find that the proposed model is free
from these instabilities everywhere. We find also that the variation of the
quasi-normal modes is affected by the conformal coupling where the deviation
from general relativity is observed. Finally, with this motivation, we fit our
numerical result with universal relations for axial quasi-normal modes using
five type of realistic equations of state. The universality of the scaled
frequency and damping time in terms of the compactness in this model is
confirmed in this model.

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The categories of this paper are: q-alg
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The categories of this paper are: comp-gas
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The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph
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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: astro-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: stat
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The categories of this paper are: nlin
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The categories of this paper are: q-bio
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The categories of this paper are: quant-ph