Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Explosive End to Intermediate-Mass Zero-Metallicity Stars and Early
  Universe Nucleosynthesis   We use the Cambridge stellar evolution code STARS to model the evolution of
5-7 solar mass zero-metallicity stars. With enhanced resolution at the hydrogen
and helium burning shell in the AGB phases, we are able to model the entire
thermally pulsing asymptotic giant branch (TP-AGB) phase. The helium
luminosities of the thermal pulses are significantly lower than in higher
metallicity stars so there is no third dredge-up. The envelope is enriched in
nitrogen by hot-bottom burning of carbon that was previously mixed in during
second dredge-up. There is no s-process enrichment owing to the lack of third
dredge up. The thermal pulses grow weaker as the core mass increases and they
eventually cease. From then on the star enters a quiescent burning phase which
lasts until carbon ignites at the centre of the star when the CO core mass is
1.36 solar mass. With such a high degeneracy and a core mass so close to the
Chandrasekhar mass, we expect these stars to explode as type 1.5 supernovae,
very similar to Type Ia supernovae but inside a hydrogen rich envelope.

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The categories of this paper are: patt-sol
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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
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The categories of this paper are: alg-geom
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The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: eess
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The categories of this paper are: cs
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The categories of this paper are: stat
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The categories of this paper are: nucl-th