Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Accretion disks in luminous young stellar objects   An observational review is provided of the properties of accretion disks
around young stars. It concerns the primordial disks of intermediate- and
high-mass young stellar objects in embedded and optically revealed phases. The
properties were derived from spatially resolved observations and therefore
predominantly obtained with interferometric means, either in the
radio/(sub)millimeter or in the optical/infrared wavelength regions. We make
summaries and comparisons of the physical properties, kinematics, and dynamics
of these circumstellar structures and delineate trends where possible. Amongst
others, we report on a quadratic trend of mass accretion rates with mass from T
Tauri stars to the highest mass young stellar objects and on the systematic
difference in mass infall and accretion rates.

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The categories of this paper are: bayes-an
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org