Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Planet Migration   Planet migration is the process by which a planet's orbital radius changes in
time. The main agent for causing gas giant planet migration is the
gravitational interaction of the young planet with the gaseous disk from which
it forms. We describe the migration rates resulting from these interactions
based on a simple model for disk properties. These migration rates are higher
than is reasonable for planet survival. We discuss some proposed models for
which the migration rates are lower. There are major uncertainties in migration
rates due to a lack of knowledge about the detailed physical properties of
disks. We also describe some additional forms of migration.

20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc