Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Violent mergers of nearly equal-mass white dwarf as progenitors of
  subluminous Type Ia supernovae   The origin of subluminous Type Ia supernovae (SNe Ia) has long eluded any
explanation, as all Chandrasekhar-mass models have severe problems reproducing
them. Recently, it has been proposed that violent mergers of two white dwarfs
of 0.9 M_sun could lead to subluminous SNe Ia events that resemble 1991bg-like
SNe~Ia. Here we investigate whether this scenario still works for mergers of
two white dwarfs with a mass ratio smaller than one. We aim to determine the
range of mass ratios for which a detonation still forms during the merger, as
only those events will lead to a SN Ia. This range is an important ingredient
for population synthesis and one decisive point to judge the viability of the
scenario. In addition, we perform a resolution study of one of the models.
Finally we discuss the connection between violent white dwarf mergers with a
primary mass of 0.9 M_sun and 1991bg-like SNe Ia. The latest version of the
smoothed particle hydrodynamics code Gadget3 is used to evolve binary systems
with different mass ratios until they merge. We analyze the result and look for
hot spots in which detonations can form. We show that mergers of two white
dwarfs with a primary white dwarf mass of ~0.9 M_sun and a mass ratio larger
than about $0.8$ robustly reach the conditions we require to ignite a
detonation and thus produce thermonuclear explosions during the merger itself.
We also find that while our simulations do not yet completely resolve the hot
spots, increasing the resolution leads to conditions that are even more likely
to ignite detonations. (abridged)

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The categories of this paper are: econ
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ph
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The categories of this paper are: math
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The categories of this paper are: stat
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The categories of this paper are: chem-ph
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The categories of this paper are: physics
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The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: funct-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: math-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol
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The categories of this paper are: quant-ph