Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First images of debris disks around TWA 7, TWA 25, HD 35650, and HD 377   We present the first images of four debris disks observed in scattered light
around the young (4--250 Myr old) M dwarfs TWA 7 and TWA 25, the K6 star HD
35650, and the G2 star HD 377. We obtained these images by reprocessing
archival Hubble Space Telescope NICMOS coronagraph data with modern
post-processing techniques as part of the Archival Legacy Investigation of
Circumstellar Environments (ALICE) program. All four disks appear faint and
compact compared with other debris disks resolved in scattered light. The disks
around TWA 25, HD 35650, and HD 377 appear very inclined, while TWA 7's disk is
viewed nearly face-on. The surface brightness of HD 35650's disk is strongly
asymmetric. These new detections raise the number of disks resolved in
scattered light around M and late-K stars from one (the AU Mic system) to four.
This new sample of resolved disks enables comparative studies of heretofore
scarce debris disks around low-mass stars relative to solar-type stars.

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The categories of this paper are: alg-geom
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-lat
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The categories of this paper are: chao-dyn
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The categories of this paper are: math
0
The categories of this paper are: hep-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: atom-ph
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The categories of this paper are: adap-org
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The categories of this paper are: cmp-lg
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The categories of this paper are: funct-an
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The categories of this paper are: eess
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The categories of this paper are: chem-ph
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The categories of this paper are: nlin
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The categories of this paper are: cs
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The categories of this paper are: plasm-ph