Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Extended Near-Infrared Emission from Candidate Protostars in the
  Taurus-Auriga Molecular Cloud   We describe near-IR imaging data for a sample of 23 class I sources in the
Taurus-Auriga dark clouds. Combining our data with previous photometry, we
detect brightness variations of 0.1-0.5 mag in many sources. The near-IR
morphologies are consistent with mm continuum measurements. Most (60%) of the
sample are true protostars; the rest may be objects in transition between class
I and class II, T Tauri stars with edge-on disks, or heavily reddened T Tauri
stars.

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The categories of this paper are: econ
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
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The categories of this paper are: q-bio
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The categories of this paper are: patt-sol
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The categories of this paper are: cs
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-th