Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hard diffuse X-ray emission around the PSR\,J2032+4127: A pulsar wind
  nebula in the Cygnus\,OB2 association   The Cygnus\,OB2 region, $\sim 3.5-5~\text{Myr}$ old, contains one of the most
significant populations of massive stars of the Milky Way. Such stars
substantially contribute to producing large scale soft ($<2~\text{keV}$)
diffuse X-ray emission. We also detected hard ($>3~\text{keV}$) diffuse X-ray
emission in the direction of the pulsar PSR\,J2032+4127. The torus-shaped
emission spans a $\approx 3'\times 2'$ jet-like structure. It is spatially
coincident with the Fermi $\gamma$-ray source 4FGL\,J2032.3+4127. We suggest
that the hard diffuse X-ray emission is the pulsar wind nebula bearing the
pulsar PSR\,J2032+4127, a consequence of a past core-collapse SN explosion in
the region.

18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
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: hep-lat
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph