Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Do electron-capture supernovae make neutron stars? First
  multidimensional hydrodynamic simulations of the oxygen deflagration   In the classical picture, electron-capture supernovae and the
accretion-induced collapse of oxygen-neon white dwarfs (ONeWDs) undergo an
oxygen deflagration phase before gravitational collapse produces a neutron star
(NS). These types of core collapse events are postulated to explain several
astronomical phenomena. In this work, the deflagration phase is simulated for
the first time using multidimensional hydrodynamics, with the aim of gaining
new insight into the explosive deaths of $8-10~M_\odot$ stars and ONeWDs that
accrete material from a binary companion star. The main aim is to determine
whether these events are thermonuclear or core-collapse supernova explosions,
and hence whether NSs are formed by such phenomena. The deflagration is
simulated in ONe cores with three different central ignition densities. The
intermediate density case is perhaps the most realistic, being based on recent
nuclear physics calculations and 1D stellar models. The 3D hydrodynamic
simulations presented in this work begin from a centrally confined flame
structure using a level-set-based flame approach and are performed in $256^3$
and $512^3$ numerical resolutions. In the simulations with intermediate and low
ignition density, the cores do not appear to collapse into NSs. Instead, almost
a solar mass of material becomes unbound from the cores, leaving bound
remnants. These simulations represent the case in which semiconvective mixing
during the electron-capture phase preceding the deflagration is inefficient.
The masses of the bound remnants double when Coulomb corrections are included
in the EoS, however they still do not exceed the effective Chandrasekhar mass
and, hence, would not collapse into NSs. The simulations with the highest
ignition density ($\log_{10}\rho_{\rm c}=10.3$), representing the case where
semiconvective mixing is very efficient, show clear signs that the core will
collapse into a NS.

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The categories of this paper are: math
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
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The categories of this paper are: stat
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: cmp-lg
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The categories of this paper are: funct-an
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol