Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Signature of a heliotail organized by the solar magnetic field and the
  role of non-ideal processes in modeled IBEX ENA maps: a comparison of the BU
  and Moscow MHD models   Energetic neutral atom (ENA) models typically require post-processing
routines to convert the distributions of plasma and H atoms into ENA maps. Here
we investigate how two different kinetic-MHD models of the heliosphere (the BU
and Moscow models) manifest in modeled ENA maps using the same prescription and
how they compare with Interstellar Boundary Explorer (IBEX) observations. Both
MHD models treat the solar wind as a single-ion plasma for protons, which
include thermal solar wind ions, pick-up ions (PUIs), and electrons. Our ENA
prescription partitions the plasma into three distinct ion populations (thermal
solar wind, PUIs transmitted and ones energized at the termination shock) and
models the populations with Maxwellian distributions. Both kinetic-MHD
heliospheric models produce a heliotail with heliosheath plasma organized by
the solar magnetic field into two distinct north and south columns that become
lobes of high mass flux flowing down the heliotail, though in the BU model the
ISM flows between the two lobes at distances in the heliotail larger than 300
AU. While our prescription produces similar ENA maps for the two different
plasma and H atom solutions at the IBEX-Hi energy range (0.5 - 6 keV), the
modeled ENA maps require a scaling factor of ~2 to be in agreement with the
data. This problem is present in other ENA models with the Maxwellian
approximation of multiple ion species and indicates that a higher neutral
density or some acceleration of PUIs in the heliosheath is required.

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The categories of this paper are: eess
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
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The categories of this paper are: q-fin
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The categories of this paper are: stat
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The categories of this paper are: econ
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
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The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: funct-an
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The categories of this paper are: acc-phys
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The categories of this paper are: q-bio