A modified peak-bagging technique for fitting low-$\ell$ solar p-modes

TL;DR

This paper presents a modified peak-bagging method for analyzing low-degree solar p-modes that improves background estimation and reduces biases without complex multi-parameter models.

Contribution

A novel modified peak-bagging technique that enhances background estimation and bias reduction in low-$$ solar p-mode analysis without extensive parameter fitting.

Findings

Accurately determines the true background level near p-mode peaks.

Reduces biases in mode parameter estimates caused by background inaccuracies.

Validated through Monte-Carlo simulations.

Abstract

We introduce a modified version of a standard power spectrum `peak-bagging' technique which is designed to gain some of the advantages that fitting the entire low-degree p-mode power spectrum simultaneously would bring, but without the problems involved in fitting a model incorporating many hundreds of parameters. Employing Monte-Carlo simulations we show that by using this modified fitting code it is possible to determine the true background level in the vicinity of the p-mode peaks. In addition to this we show how small biases in other mode parameters, which are related to inaccurate estimates of the true background, are also consequently removed.