Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dusty Debris Disks as Signposts of Planets: Implications for SIRTF   Submillimeter and near-infrared images of cool dusty debris disks and rings
suggest the existence of unseen planets. At dusty but non-imaged stars,
semi-major axes of associated planets can be estimated from the dust
temperature. For some young stars these semi-major axes are greater than an arc
second as seen from Earth. Such stars are excellent targets for sensitive
near-infrared imaging searches for warm planets. To probe the full extent of
the dust and hence of potential planetary orbits, SIRTF observations should
include measurements with the 160mu filter.

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The categories of this paper are: hep-th
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The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
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The categories of this paper are: nucl-th
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The categories of this paper are: math
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The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
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The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
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The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an