Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Simple Calculation in Service of Constraining the Rate of FU Orionis
  Outburst Events from Photometric Monitoring Surveys   An enigmatic and rare type of young stellar object is the FU Orionis class.
The members are interpreted as "outbursting," that is, currently in a state of
enhanced accretion by several orders of magnitude relative to the more modest
disk-to-star accretion rates measured in typical T Tauri stars. They are key to
our understanding of the history of stellar mass assembly and pre-main sequence
evolution, as well as critical to consider in the chemical and physical
evolution of the circumstellar environment -- where planets form. A common
supposition is that *all* T Tauri stars undergo repeated such outbursts, more
frequently in their earlier evolutionary stages when the disks are more
massive, so as to build up the requisite amount of stellar mass on the required
time scale. However, the actual data supporting this traditional picture of
episodically enhanced disk accretion are limited, and the observational
properties of the known sample of FU Ori objects quite diverse. To improve our
understanding of these rare objects, we outline the logic for meaningfully
constraining the rate of FU Ori outbursts and present numbers to guide
parameter choices in the analysis of time domain surveys.

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The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
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The categories of this paper are: hep-th
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The categories of this paper are: q-fin
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The categories of this paper are: alg-geom