Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Heart-shaped Supernova Remnant 3C391 viewed in Multi-bands   Using Chandra X-ray, Spitzer mid-IR, and 1.5 GHz radio data, we examine the
spatial structure of SNR 3C391. The X-ray surface brightness is generally
anti-correlative with the IR and radio brightness. The multiband data clearly
exhibit a heart-shaped morphology and show the multi-shell structure of the
remnant. A thin brace-like shell on the south detected at 24 um is projected
outside the radio border and confines the southern faint X-ray emission. The
leading 24 um knot on the SE boundary appears to be partly surrounded by soft
X-ray emitting gas. The mid-IR emission is dominated by the contribution of the
shocked dust grains, which may have been partly destroyed by sputtering.

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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
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The categories of this paper are: nlin
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The categories of this paper are: hep-lat
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The categories of this paper are: alg-geom
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-th
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The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: funct-an