Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: GW170817: The energy extraction process of the off-axis relativistic
  outflow and the constraint on the equation of state of neutron stars   As revealed recently by the modeling of the multi-wavelength data of the
emission following GW170817/GRB 170817A, there was an off-axis energetic
relativistic outflow component launched by this historic double neutron star
merger event. In this work we use the results of these modeling to examine the
energy extraction process of the central engine. We show that the magnetic
process (i.e., the Blandford-Znajek mechanism) is favored, while the neutrino
process usually requires a too massive accretion disk if the duration of the
central engine activity is comparable to the observed $T_{90}$ of GRB 170817A,
unless the timescale of the central engine activity is less than $\sim$ 0.2s.
We propose that the GRB observations are helpful to constrain the combined
tidal parameter $\tilde{\Lambda}$, and by adopting the accretion disk mass
distribution estimated in BZ mechanism, the $90\%$ credible interval of
$\tilde{\Lambda}$ for the progenitor of GW170817 is inferred as $309-954$.

14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol