Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relativistic stars in degenerate higher-order scalar-tensor theories
  after GW170817   We study relativistic stars in degenerate higher-order scalar-tensor theories
that evade the constraint on the speed of gravitational waves imposed by
GW170817. It is shown that the exterior metric is given by the usual
Schwarzschild solution if the lower order Horndeski terms are ignored in the
Lagrangian and a shift symmetry is assumed. However, this class of theories
exhibits partial breaking of Vainshtein screening in the stellar interior and
thus modifies the structure of a star. Employing a simple concrete model, we
show that for high-density stars the mass-radius relation is altered
significantly even if the parameters are chosen so that only a tiny correction
is expected in the Newtonian regime. We also find that, depending on the
parameters, there is a maximum central density above which solutions cease to
exist.

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The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ