Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Krypton isotopes and noble gas abundances in the coma of comet
  67P/Churyumov-Gerasimenko   The ROSINA mass spectrometer DFMS on board ESA's Rosetta spacecraft detected
the major isotopes of the noble gases argon, krypton, and xenon in the coma of
comet 67P/Churyumov-Gerasimenko. Earlier, it has been shown that xenon exhibits
an isotopic composition distinct from anywhere else in the solar system.
However, argon isotopes, within error, were shown to be consistent with solar
isotope abundances. This discrepancy suggested an additional exotic component
of xenon in comet 67P/Churyumov-Gerasimenko. Here we show that also krypton
exhibits an isotopic composition close to solar. Furthermore, we found a
depletion compared to solar of argon with respect to krypton and of krypton
with respect to xenon, which is a necessity to postulate an addition of exotic
xenon in the comet.

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The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: cs
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The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
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The categories of this paper are: gr-qc
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The categories of this paper are: q-bio
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The categories of this paper are: hep-lat
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The categories of this paper are: nlin
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The categories of this paper are: dg-ga