Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First AU-scale observations of V1647 Ori with VLTI/MIDI   The young eruptive star V1647 Ori was observed with MIDI, the mid-infrared
interferometric instrument at the Very Large Telescope Interferometer (VLTI),
on March 2, 2005. We present the first spectrally resolved interferometric
visibility points for this object. Our results show that (1) the mid-infrared
emitting region is extended, having a size of ~ 7 AU at 10 um; (2) no
signatures of a close companion can be seen; (3) the 8-13 um spectrum exhibits
no obvious spectral features. Comparison with similar observations of Herbig Ae
stars suggests that V1647 Ori probably possesses a disk of moderate flaring. A
simple disk model with T ~ r^{-0.53}, \Sigma ~ r^{-1.5}, M_d = 0.05 M_Sun is
able to fit both the spectral energy distribution and the observed visibility
values simultaneously.

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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-ph
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The categories of this paper are: econ
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The categories of this paper are: bayes-an
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The categories of this paper are: q-alg
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The categories of this paper are: plasm-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: nlin
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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: chem-ph
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The categories of this paper are: math-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: funct-an
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The categories of this paper are: hep-th