Definitive Sun-as-a-star p-mode frequencies: 23 years of BiSON observations

TL;DR

This paper provides highly precise low-degree p-mode frequency estimates from 23 years of BiSON helioseismic data, offering valuable insights into solar oscillations during different activity levels.

Contribution

It delivers the longest and most accurate set of low-degree p-mode frequencies, including corrections for solar activity, enhancing helioseismic analysis.

Findings

High-precision frequencies over 23 years of data

Frequency corrections for different solar activity levels

Extended dataset improves helioseismic models

Abstract

We present a list of "best possible" estimates of low-degree p-mode frequencies, from 8640 days of observations made by the Birmingham Solar-Oscillations Network (BiSON). This is the longest stretch of helioseismic data ever used for this purpose, giving exquisite precision in the estimated frequencies. Every effort has been made in the analysis to ensure that the frequency estimates are also accurate. In addition to presenting the raw best-fitting frequencies from our "peak bagging" analysis, we also provide tables of corrected frequencies pertinent to the quiet-Sun and an intermediate level of solar activity.