Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New Mass Loss Measurements from Astrospheric Lyman-alpha Absorption   Measurements of stellar mass loss rates are used to assess how wind strength
varies with coronal activity and age for solar-like stars. Mass loss generally
increases with activity, but we find evidence that winds suddenly weaken at a
certain activity threshold. Very active stars are often observed to have polar
starspots, and we speculate that the magnetic field geometry associated with
these spots may be inhibiting the winds. Our inferred mass-loss/age relation
represents an empirical estimate of the history of the solar wind. This result
is important for planetary studies as well as solar/stellar astronomy, since
solar wind erosion may have played an important role in the evolution of
planetary atmospheres.

24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
16
The categories of this paper are: stat
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas