Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamic transition of supercritical hydrogen in gas giants: defining the
  boundary between interior and atmosphere   Understanding physics of gas giants requires the knowledge about the behavior
of hydrogen at extreme pressures and temperatures. Molecular hydrogen in these
planets is supercritical, and has been considered as a physically homogeneous
state where no differences can be made between a liquid and a gas and where all
properties undergo no marked or distinct changes with pressure and temperature,
the picture believed to hold below the dissociation and metallization
transition. Here, we show that in Jupiter and Saturn, supercritical molecular
hydrogen undergoes a dynamic transition around 10 GPa and 3000 K from the
"rigid" liquid state to the "non-rigid" gas-like fluid state at the Frenkel
line recently proposed, with accompanying qualitative changes of all major
physical properties. The consequences of this finding are discussed, including
a physically justified way to demarcate the interior and the atmosphere in gas
giants.

28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs