Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Common envelope jets supernova r-process yields can reproduce $\rm
  [Eu/Fe]$ abundance evolution in the Galaxy   We use a numerical Galactic chemical evolution model and find that the common
envelope jets supernova (CEJSN) r-process scenario can account for both the
very early average ratio of europium to iron and its evolution at later times
in the Milky-Way (MW) Galaxy. In the CEJSN scenario a neutron star (NS)
spirals-in inside a red supergiant (RSG) star all the way to the core and
destroys it. According to this scenario r-process isotopes are
nucleosynthesized inside neutron-rich jets that the accretion disk around the
NS launches inside the core. The merger of a NS with an RSG core already takes
place in the very young Galaxy. We conclude that CEJSNe can be a major
contributor to r-process nucleosynthesis.

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The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
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The categories of this paper are: cs
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The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph