Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High Abundances of Presolar Grains and $^{15}$N-rich Organic Matter in
  CO3.0 Chondrite Dominion Range 08006   NanoSIMS C-, N-, and O-isotopic mapping of matrix in CO3.0 chondrite Dominion
Range (DOM) 08006 revealed it to have in its matrix the highest abundance of
presolar O-rich grains (257 +76 / -96 ppm, 2$\sigma$) of any meteorite. It also
has a matrix abundance of presolar SiC of 35 (+25 / -17, 2$\sigma$) ppm,
similar to that seen across primitive chondrite classes. This provides
additional support to bulk isotopic and petrologic evidence that DOM 08006 is
the most primitive known CO meteorite. Transmission electron microscopy of five
presolar silicate grains revealed one to have a composite mineralogy similar to
larger amoeboid olivine aggregates and consistent with equilibrium
condensation, two non-stoichiometric amorphous grains and two olivine grains,
though one is identified as such solely based on its composition. We also found
insoluble organic matter (IOM) to be present primarily as sub-micron inclusions
with ranges of C- and N-isotopic anomalies similar to those seen in primitive
CR chondrites and interplanetary dust particles. In contrast to other primitive
extraterrestrial materials, H isotopic imaging showed normal and homogeneous
D/H. Most likely, DOM 08006 and other CO chondrites accreted a similar
complement of primitive and isotopically anomalous organic matter to that found
in other chondrite classes and IDPs, but the very limited amount of thermal
metamorphism experienced by DOM 08006 has caused loss of D-rich organic
moieties, while not substantially affecting either the molecular carriers of C
and N anomalies or most inorganic phases in the meteorite. One C-rich grain
that was highly depleted in $^{13}$C and $^{15}$N was identified; we propose it
originated in the Sun's parental molecular cloud.

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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
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The categories of this paper are: stat
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: chem-ph
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The categories of this paper are: plasm-ph
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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: ao-sci
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The categories of this paper are: solv-int
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The categories of this paper are: cmp-lg