Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evidence for Dynamical Changes in a Transitional Protoplanetary Disk
  with Mid-infrared Variability   We present multi-epoch Spitzer Space Telescope observations of the
transitional disk LRLL 31 in the 2-3 Myr-old star forming region IC 348. Our
measurements show remarkable mid-infrared variability on timescales as short as
one week. The infrared continuum emission exhibits systematic
wavelength-dependent changes that suggest corresponding dynamical changes in
the inner disk structure and variable shadowing of outer disk material. We
propose several possible sources for the structural changes, including a
variable accretion rate or a stellar or planetary companion embedded in the
disk. Our results indicate that variability studies in the infrared can provide
important new constraints on protoplanetary disk behavior.

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The categories of this paper are: hep-th
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
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The categories of this paper are: nlin
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int