Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charge States and FIP Bias of the Solar Wind from Coronal Holes, Active
  Regions, and Quiet Sun   Connecting in-situ measured solar-wind plasma properties with typical regions
on the Sun can provide an effective constraint and test to various solar wind
models. We examine the statistical characteristics of the solar wind with an
origin in different types of source regions. We find that the speed
distribution of coronal hole (CH) wind is bimodal with the slow wind peaking at
~400 km/s and a fast at ~600 km/s. An anti-correlation between the solar wind
speeds and the O7+/O6+ ion ratio remains valid in all three types of solar wind
as well during the three studied solar cycle activity phases, i.e. solar
maximum, decline and minimum. The N_Fe/N_O range and its average values all
decrease with the increasing solar wind speed in different types of solar wind.
The N_Fe/N_O range (0.06-0.40, FIP bias range 1-7) for AR wind is wider than
for CH wind (0.06-0.20, FIP bias range 1-3) while the minimum value of N_Fe/N_O
(0.06) does not change with the variation of speed, and it is similar for all
sourceregions. The two-peak distribution of CH wind and the anti-correlation
between the speed and O7+/O6+ in all three types of solar wind can be explained
qualitatively by both the wave-turbulence-driven (WTD) and
reconnection-loop-opening (RLO) models, whereas the distribution features of
N_Fe/N_O in different source regions of solar wind can be explained more
reasonably by the RLO models.

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The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
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The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
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The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: acc-phys
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The categories of this paper are: math-ph
16
The categories of this paper are: stat
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The categories of this paper are: dg-ga
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The categories of this paper are: comp-gas
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
9
The categories of this paper are: nlin