Features of spatial distribution of oscillations in faculae regions

TL;DR

This study investigates the spatial distribution of oscillations in faculae regions, revealing variations in velocity oscillations, dominant periods, and magnetic field correlations in the solar atmosphere.

Contribution

It provides new insights into the spatial and spectral characteristics of oscillations in faculae, highlighting differences between photospheric and chromospheric velocities and their magnetic associations.

Findings

Low-frequency modes increase at network boundaries.

Five- and three-minute periods dominate inside cells.

Propagating oscillations often linked to magnetic field maxima.

Abstract

We found that oscillations of LOS velocity in H-alpha are different for various parts of faculae regions. Power spectra show that the contribution of low-frequency modes (1.2 - 2 mHz) increase at the network boundaries. Three and five- minute periods dominate inside cells. The spectra of photosphere and chromosphere LOS velocity oscillations differ for most faculae. On the other hand, we detected several cases where propagating oscillations in faculae were manifest with a five-minute period. Their initiation point on spatial-temporal diagrams coincided with the local maximum of the longitudinal magnetic field.