Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Young Stars in the Time Domain: A Cool Stars 16 Splinter Summary   Variability is a defining characteristic of young stellar systems, and
optical variability has been heavily studied to select and characterize the
photospheric properties of young stars. In recent years, multi-epoch
observations sampling a wider range of wavelengths and time-scales have
revealed a wealth of time-variable phenomena at work during the star formation
process. This splinter session was convened to summarize recent progress in
providing improved coverage and understanding of time-variable processes in
young stars and circumstellar disks. We begin by summarizing results from
several multi-epoch Spitzer campaigns, which have demonstrated that many young
stellar objects evidence significant mid-IR variability. While some of these
variations can be attributed to processes in the stellar photosphere, others
appear to trace short time-scale changes in the circumstellar disk which can be
successfully modeled with axisymmetric or non-axisymmetric structures. We also
review recent studies probing variability at shorter wavelengths that provide
evidence for high frequency pulsations associated with accretion outbursts,
correlated optical/X-ray variability in Classical T Tauri stars, and magnetic
reversals in young solar analogs.

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The categories of this paper are: ao-sci
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
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The categories of this paper are: hep-lat
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The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
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The categories of this paper are: chem-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
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The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org
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The categories of this paper are: bayes-an
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The categories of this paper are: eess