Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Wide-Field Thermal Imaging of the Orion Nebula at High Spatial
  Resolution   We describe multi-wavelength (8--20 micron), diffraction-limited,
mid-infrared images of the OMC-1 cloud core in Orion, covering an approximately
two arcminute area around the Trapezium and BN/KL regions. We have detected
mid-infrared emission at the locations of a subset of the previously identified
proplyds in the Orion Nebula along with two new infrared sources. The Ney-Allen
nebula surrounding the OB star theta 1 Ori d exhibits a ring or toroidal
structure at the longest wavelengths. The BN/KL complex appears as an extended,
butterfly-shaped structure with significant bipolar symmetry which is
bifurcated by a dust lane at the longer wavelengths. The infrared sources IRc3,
4, and 5 give the appearance of a ring-like structure with a possible jet-like
protrusion from its center along a line from IRc2. Derived color temperature
and dust opacity maps suggest that IRc3, 4, and 5 may not be self-luminous
objects.

31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
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The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
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The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
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The categories of this paper are: patt-sol
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The categories of this paper are: econ
11
The categories of this paper are: hep-lat