Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Improved Constraints on the Disk Around MWC 349A from the 23-Meter LBTI   We present new spatially resolved observations of MWC 349A from the Large
Binocular Telescope Interferometer (LBTI), a 23-meter baseline interferometer
made up of two, co-mounted 8-meter telescopes. MWC 349A is a B[e] star with an
unknown evolutionary state. Proposed scenarios range from a young stellar
object (YSO), to a B[e] supergiant, to a tight binary system. Radio continuum
and recombination line observations of this source revealed a sub-arcsecond
bipolar outflow surrounding a ~100 mas circumstellar disk. Followup infrared
studies detected the disk, and suggested that it may have skew and an inner
clearing. Our new infrared interferometric observations, which have more than
twice the resolution of previously-published datasets, support the presence of
both skew and a compact infrared excess. They rule out inner clearings with
radii greater than ~14 mas. We show the improvements in disk parameter
constraints provided by LBTI, and discuss the inferred disk parameters in the
context of the posited evolutionary states for MWC 349A.

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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th
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The categories of this paper are: q-bio
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The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
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The categories of this paper are: econ
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: gr-qc
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The categories of this paper are: physics
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The categories of this paper are: hep-lat