Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The innermost astronomical unit of protoplanetary disks   Circumstellar disks around young stars are the birthsites of planets. It is
thus fundamental to study the disks in which they form, their structure and the
physical conditions therein. The first astronomical unit is of great interest
because this is where the terrestrial-planets form and the angular momentum is
controled via massloss through winds/jets. With its milli-arcsecond resolution,
optical interferometry is the only technic able to spatially resolve the first
few astronomical units of the disk. In this review, we will present a broad
overview of studies of young stellar objects with interferometry, and discuss
prospects for the future.

27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
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The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
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The categories of this paper are: q-alg
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The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat