Does the Selection of a Quiet Region Influence the Local Helioseismic Inferences?

TL;DR

This study investigates how the choice of quiet regions affects helioseismic inferences, revealing that variations between quiet regions can bias results if only one is used.

Contribution

It demonstrates that differences between quiet regions can be as significant as those between active and quiet regions, highlighting potential biases in helioseismic studies.

Findings

Mode parameter differences between quiet regions can be as large as those between active and quiet regions.

Results based on a single quiet region may be biased.

The selection of quiet regions influences helioseismic inferences.

Abstract

We apply the ring-diagram technique to high resolution Dopplergrams in order to estimate the variation in oscillation mode parameters between active and quiet regions. We demonstrate that the difference in mode parameters between two quiet regions can be as large as those between a pair of active and quiet region. This leads us to conclude that the results derived on the basis of a single quiet region could be biased.