Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neon Cluster Formation and Phase Separation During White Dwarf Cooling   Recent observations of Galactic white dwarfs (WDs) with Gaia suggest there is
a population of massive crystallizing WDs exhibiting anomalous cooling -- the Q
branch. While single-particle $^{22}$Ne sedimentation has long been considered
a possible heat source, recent work suggests that $^{22}$Ne must separate into
clusters, enhancing diffusion, in order for sedimentation to provide heating on
the observed timescale. We show definitively that $^{22}$Ne cannot separate to
form clusters in C/O WDs using molecular dynamics simulations, and we further
present a general C/O/Ne phase diagram showing that strong $^{22}$Ne enrichment
is not achievable for $^{22}$Ne abundance $\lesssim 30\%$. We conclude that the
anomalous heating cannot be due to $^{22}$Ne cluster sedimentation and that Q
branch WDs may have an unusual composition, possibly rich with heavier
elements.

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The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
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The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
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The categories of this paper are: cmp-lg
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
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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
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga