Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The final fate of stars that ignite neon and oxygen off-center: electron
  capture or iron core-collapse supernova?   In the ONeMg cores of $8.8-9.5~{\rm M}_\odot$ stars, neon and oxygen burning
is ignited off-center. Whether the neon-oxygen flame propagates to the center
is critical to determine whether these stars undergo Fe core collapse or
electron capture induced ONeMg core collapse. We present more details of stars
that ignite neon and oxygen burning off-center. The neon flame is established
in a similar manner to the carbon flame of super-AGB stars, albeit with a
narrower flame width. The criteria for establishing a flame are able to be met
if the strict Schwarzschild criterion for convective instability is adopted.
Mixing across the interface of the convective shell disrupts the conditions for
the propagation of the burning front and instead the shell burns as a series of
inward-moving flashes. While this may not directly affect whether the burning
will reach the center (as in super-AGB stars), the core is allowed to contract
between each shell flash. Reduction of the electron fraction in the shell
reduces the Chandrasekhar mass and the center reaches the threshold density for
the URCA process to activate and steer the remaining evolution of the core.
This highlights the importance of a more accurate treatment of mixing in the
stellar interior for yet another important question in stellar astrophysics -
determining the properties of stellar evolution and supernova progenitors at
the boundary between electron capture supernova and iron core-collapse
supernova.

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The categories of this paper are: funct-an
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The categories of this paper are: econ
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
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The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
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The categories of this paper are: eess
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The categories of this paper are: dg-ga
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The categories of this paper are: q-fin
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The categories of this paper are: math-ph
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The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-lat