Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Astro2020 White Paper: The L/T Transition   The L/T transition is an important evolutionary phase in brown dwarf
atmospheres, providing us with a unique opportunity to explore the effects of
clouds, convection, winds, gravity and metallicity across a very narrow
temperature range. Understanding these physical processes is critical for
understanding ultracool atmospheres. In the next decade, we will answer three
key questions regarding L/T transition atmospheres: 1. What is the physical
mechanism behind the L/T transition? 2. What is the spatial extent of
atmospheric structures at the L/T transition? 3. How do gravity and metallicity
affect the L/T transition? The theory and methods developed for brown dwarfs
will be used in the 2030s and beyond for solar-system age giant exoplanets and
eventually habitable zone earth analogues. Developing these techniques now are
crucial.

3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg