Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraining Black Holes with Light Boson Hair and Boson Stars using
  Epicyclic Frequencies and QPOs   Light bosonic fields are ubiquitous in extensions of the Standard Model. Even
when minimally coupled to gravity, these fields might evade the assumptions of
the black-hole no-hair theorems and give rise to spinning black holes which can
be drastically different from the Kerr metric. Furthermore, they allow for
self-gravitating compact solitons, known as (scalar or Proca) boson stars. The
quasi-periodic oscillations (QPOs) observed in the X-ray flux emitted by
accreting compact objects carry information about the strong-field region, thus
providing a powerful tool to constrain deviations from Kerr's geometry and to
search for exotic compact objects. By using the relativistic precession model
as a proxy to interpret the QPOs in terms of geodesic frequencies, we
investigate how the QPO frequencies could be used to test the no-hair theorem
and the existence of light bosonic fields near accreting compact objects. We
show that a detection of two QPO triplets with current sensitivity can already
constrain these models, and that the future eXTP mission or a LOFT-like mission
can set very stringent constraints on black holes with bosonic hair and on
(scalar or Proca) boson stars. The peculiar geodesic structure of compact
scalar/Proca boson stars implies that these objects can easily be ruled out as
alternative models for X-ray source GRO J1655-40.

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The categories of this paper are: solv-int
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The categories of this paper are: math-ph
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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: ao-sci
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The categories of this paper are: nlin
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-th
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The categories of this paper are: funct-an
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The categories of this paper are: stat
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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom