Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Asymmetric Magnetic Reconnection in Weakly Ionized Chromospheric Plasmas   Realistic models of magnetic reconnection in the solar chromosphere must take
into account that the plasma is partially ionized and that plasma conditions
within any two magnetic flux bundles undergoing reconnection may not be the
same. Asymmetric reconnection in the chromosphere may occur when newly emerged
flux interacts with pre-existing, overlying flux. We present 2.5D simulations
of asymmetric reconnection in weakly ionized, reacting plasmas where the
magnetic field strengths, ion and neutral densities, and temperatures are
different in each upstream region. The plasma and neutral components are
evolved separately to allow non-equilibrium ionization. As in previous
simulations of chromospheric reconnection, the current sheet thins to the scale
of the neutral-ion mean free path and the ion and neutral outflows are strongly
coupled. However, the ion and neutral inflows are asymmetrically decoupled. In
cases with magnetic asymmetry, a net flow of neutrals through the current sheet
from the weak field (high density) upstream region into the strong field
upstream region results from a neutral pressure gradient. Consequently,
neutrals dragged along with the outflow are more likely to originate from the
weak field region. The Hall effect leads to the development of a characteristic
quadrupole magnetic field modified by asymmetry, but the X-point geometry
expected during Hall reconnection does not occur. All simulations show the
development of plasmoids after an initial laminar phase.

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The categories of this paper are: gr-qc
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The categories of this paper are: funct-an
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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
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The categories of this paper are: math
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The categories of this paper are: q-fin
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The categories of this paper are: q-bio
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The categories of this paper are: comp-gas
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The categories of this paper are: solv-int
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The categories of this paper are: eess
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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: quant-ph