Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stellar winds and planetary atmospheres   Interactions between the winds of stars and the magnetospheres and
atmospheres of planets involve many processes, including the acceleration of
particles, heating of upper atmospheres, and a diverse range of atmospheric
loss processes. Winds remove angular momentum from their host stars causing
rotational spin-down and a decay in magnetic activity, which protects
atmospheres from erosion. While wind interactions are strongly influenced by
the X-ray and ultraviolet activity of the star and the chemical composition of
the atmosphere, the role of planetary magnetic fields is unclear. In this
chapter, I review our knowledge of the properties and evolution of stellar
activity and winds and discuss the influences of these processes on the long
term evolution of planetary atmospheres. I do not consider the large number of
important processes taking place at the surfaces of planets that cause
exchanges between the atmosphere and the planet's interior.

36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin