Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fate of a neutron star with an endoparasitic black hole and implications
  for dark matter   We study the dynamics and observational signatures of a neutron star being
consumed by a much less massive black hole residing inside the star. This
phenomenon could arise in a variety of scenarios, including after the capture
of a primordial black hole, or in some models of asymmetric dark matter where
the dark matter particles collect at the center of a neutron star and
eventually collapse to form a black hole. However, the details of how the
neutron star implodes are not well known, which is crucial to determining the
observational implications of such events. We utilize fully general
relativistic simulations to follow the evolution of such a black hole as it
grows by several orders of magnitude, and ultimately consumes the neutron star.
We consider a range of spin values for the neutron star, from non-rotating
stars, to those with millisecond periods, as well as different equations of
state. We find that as the black hole grows, it obtains a non-negligible spin
and induces differential rotation in the core of the neutron star. In contrast
to previous studies, we find that the amount of dynamical ejecta is very small,
even for rapidly rotating stars, dampening the prospects for producing a
kilonova-type electromagnetic signal from such events. We comment on other
possible electromagnetic and gravitational signals.

9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
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The categories of this paper are: hep-lat
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The categories of this paper are: bayes-an
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The categories of this paper are: physics
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The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys