Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Amplitude Modulation of Short-Timescale Hot Spot Variability   Variability of Classical T Tauri Systems (CTTS) occurs over a vast range of
timescales. CTTS in particular are subject to variability caused by accretion
shocks which can occur stochastically, periodically, or quasi-periodically on
timescales over a few days. The detectability of young planets within these
systems is likely hampered by activity; therefore, it is essential that we
understand the origin of young star variability over a range of timescales to
help disentangle stellar activity from signatures of planetary origin. We
present analysis of the stochastic small-amplitude photometric variability in
the K2 lightcurve of CI Tau occurring on timescales of $\lesssim$1 d. We find
the amplitude of this variability exhibits the same periodic signatures as
detected in the large-amplitude variability, indicating that the physical
mechanism modulating these brightness features is the same. The periods
detected are also in agreement with the rotation period of the star ($\sim$6.6
d), and orbital period of the planet ($\sim$9.0 d) known to drive pulsed
accretion onto the star.

7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
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The categories of this paper are: physics
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
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The categories of this paper are: cond-mat
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The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom