The acoustic low-degree modes of the Sun measured with 14 years of continuous GOLF & VIRGO measurements

TL;DR

This study analyzes 14 years of continuous space-based observations from GOLF and VIRGO instruments to characterize low-degree acoustic modes of the Sun, focusing on low-frequency modes with high precision.

Contribution

It provides a detailed characterization of solar acoustic modes over 14 years, emphasizing low-frequency modes using stable space observations.

Findings

Identification of low-degree acoustic modes

Enhanced understanding of low-frequency solar oscillations

High-quality data over 14 years

Abstract

The helioseismic Global Oscillation at Low Frequency (GOLF) and the Variability of solar Irradiance and Gravity Oscillations (VIRGO) instruments onboard SoHO, have been observing the Sun continuously for the last 14 years. In this preliminary work, we characterize the acoustic modes over the entire p-mode range in both, Doppler velocity and luminosity, with a special care for the low-frequency modes taking advantage of the stability and the high duty cycle of space observations.