Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Jupiter's X-ray aurora during UV dawn storms and injections as observed
  by XMM-Newton, Hubble, and Hisaki   We present results from a multiwavelength observation of Jupiter's northern
aurorae, carried out simultaneously by XMM-Newton, the Hubble Space Telescope
(HST), and the Hisaki satellite in September 2019. HST images captured dawn
storms and injection events in the far ultraviolet aurora several times during
the observation period. Magnetic reconnection occurring in the middle
magnetosphere caused by internal drivers is thought to start the production of
those features. The field lines then dipolarize which injects hot
magnetospheric plasma from the reconnection site to enter the inner
magnetosphere. Hisaki observed an impulsive brightening in the dawnside Io
plasma torus (IPT) during the final appearance of the dawn storms and injection
events which is evidence that a large-scale plasma injection penetrated the
central IPT between 6-9 RJ (Jupiter radii). The extreme ultraviolet aurora
brightened and XMM-Newton detected an increase in the hard X-ray aurora count
rate, suggesting an increase in electron precipitation. The dawn storms and
injections did not change the brightness of the soft X-ray aurora and they did
not "switch-on" its commonly observed quasi-periodic pulsations. Spectral
analysis of the X-ray aurora suggests that the precipitating ions responsible
for the soft X-ray aurora were iogenic and that a powerlaw continuum was needed
to fit the hard X-ray part of the spectra. The spectra coincident with the dawn
storms and injections required two powerlaw continua to get good fits.

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The categories of this paper are: funct-an
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The categories of this paper are: alg-geom
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The categories of this paper are: ao-sci
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The categories of this paper are: stat
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The categories of this paper are: acc-phys
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: cs
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The categories of this paper are: adap-org
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The categories of this paper are: math
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The categories of this paper are: quant-ph
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The categories of this paper are: solv-int
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The categories of this paper are: hep-th
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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: q-alg