Valeriy Vasilyev
2021-10-18
<p> Magnetic activity affects the observed properties of solar p modes:<br>
mode frequencies and linewidths increase with solar activity. Using VIRGO/SPM<br>
data from solar cycles 23 and 24 we show that solar-cycle variations are<br>
measurable in the temporal autocorrelation function of the p modes. Following<br>
a method developed for local helioseismology, we measure the p-mode travel<br>
times for multiple skips and propose to average these to enhance the<br>
signal-to-noise ratio. This method is robust to noise, simpler to implement<br>
than peak bagging in the frequency domain, and promising for asteroseismology<br>
applications. We estimate that the activity cycles of Sun-like stars may be<br>
detectable in long photometric time series.</p>
https://doi.org/10.5281/zenodo.5575745
oai:zenodo.org:5575745
Zenodo
https://zenodo.org/communities/plato2021
https://doi.org/10.5281/zenodo.5575744
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
A new seismic diagnostics of stellar activity cycles
info:eu-repo/semantics/lecture