Presentation Open Access

# A new seismic diagnostics of stellar activity cycles

Valeriy Vasilyev

### Citation Style Language JSON Export

{
"publisher": "Zenodo",
"DOI": "10.5281/zenodo.5578911",
"author": [
{
"family": "Valeriy Vasilyev"
}
],
"issued": {
"date-parts": [
[
2021,
10,
18
]
]
},
"abstract": "<p>&nbsp;Magnetic activity affects the observed properties of solar p modes:<br>\nmode frequencies and linewidths increase with solar activity. Using VIRGO/SPM<br>\ndata from solar cycles 23 and 24 we show that solar-cycle variations are<br>\nmeasurable in the temporal autocorrelation function of the p modes. Following<br>\na method developed for local helioseismology, we measure the p-mode travel<br>\ntimes for multiple skips and propose to average these to enhance the<br>\nsignal-to-noise ratio. This method is robust to noise, simpler to implement<br>\nthan peak bagging in the frequency domain, and promising for asteroseismology<br>\napplications. We estimate that the activity cycles of Sun-like stars may be<br>\ndetectable in long photometric time series.</p>",
"title": "A new seismic diagnostics of  stellar activity cycles",
"type": "speech",
"id": "5578911"
}
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