Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Kinetic-scale current sheets in near-Sun solar wind: properties,
  scale-dependent features and reconnection onset   We present statistical analysis of 11,200 proton kinetic-scale current sheets
(CS) observed by Parker Solar Probe during 10 days around the first perihelion.
The CS thickness $\lambda$ is in the range from a few to 200 km with the
typical value around 30 km, while current densities are in the range from 0.1
to 10\;$\mu {\rm A/m^2}$ with the typical value around 0.7\;$\mu {\rm A/m^2}$.
These CSs are resolved thanks to magnetic field measurements at 73--290
Samples/s resolution. In terms of proton inertial length $\lambda_{p}$, the CS
thickness $\lambda$ is in the range from about $0.1$ to $10\lambda_{p}$ with
the typical value around 2$\lambda_{p}$. The magnetic field magnitude does not
substantially vary across the CSs and, accordingly, the current density is
dominated by the magnetic field-aligned component. The CSs are typically
asymmetric with statistically different magnetic field magnitudes at the CS
boundaries. The current density is larger for smaller-scale CSs, $J_0\approx
0.15 \cdot (\lambda/100\;{\rm km})^{-0.76}$ $\mu {\rm A/m^2}$, but does not
statistically exceed the Alfv\'en current density $J_A$ corresponding to the
ion-electron drift of local Alfv\'{e}n speed. The CSs exhibit remarkable
scale-dependent current density and magnetic shear angles, $J_0/J_{A}\approx
0.17\cdot (\lambda/\lambda_{p})^{-0.67}$ and $\Delta \theta\approx
21^{\circ}\cdot (\lambda/\lambda_{p})^{0.32}$. Based on these observations and
comparison to recent studies at 1 AU, we conclude that proton kinetic-scale CSs
in the near-Sun solar wind are produced by turbulence cascade and they are
automatically in the parameter range, where reconnection is not suppressed by
the diamagnetic mechanism, due to their geometry dictated by turbulence
cascade.

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The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
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The categories of this paper are: mtrl-th
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The categories of this paper are: adap-org
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
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The categories of this paper are: cs
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The categories of this paper are: q-bio
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The categories of this paper are: hep-lat