Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Predicting frequency changes of global-scale solar Rossby modes due to
  solar cycle changes in internal rotation   Context. Large-scale equatorial Rossby modes have been observed on the Sun
over the last two solar cycles. Aims. We investigate the impact of the
time-varying zonal flows on the frequencies of Rossby modes. Methods. A
first-order perturbation theory approach is used to obtain an expression for
the expected shift in the mode frequencies due to perturbations in the internal
rotation rate. Results. Using the time-varying rotation from helioseismic
inversions we predict the changes in Rossby mode frequencies with azimuthal
orders from m = 1 to m = 15 over the last two solar cycles. The peak-to-peak
frequency change is less than 1 nHz for the m = 1 mode, grows with m, and
reaches 25 nHz for m = 15. Conclusions. Given the observational uncertainties
on mode frequencies due to the finite mode lifetimes, we find that the
predicted frequency shifts are near the limit of detectability.

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The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
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The categories of this paper are: cmp-lg
2
The categories of this paper are: math
18
The categories of this paper are: econ
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
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The categories of this paper are: nucl-th