Features of spatial distribution of oscillations in faculae regions

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.

6 pages, 4 figures

References in corpus (1)

• Channeling 5-min photospheric oscillations into the solar outer atmosphere through small-scale vertical magnetic flux tubes

Cited by in corpus (6)

• Influence of the Magnetic Field on Oscillation Spectra in Solar Faculae
• Oscillations in the Solar Faculae. III. The Phase Relations between Chromospheric and Photospheric LOS Velocities
• Propagating Oscillations in the Lower Atmosphere under Coronal Holes
• Using Flare-Induced Modulation of Three- and Five-Minute Oscillations for Studying Wave Propagation in the Solar Atmosphere
• Multilevel Observations of the Oscillations in the First Active Region of the New Cycle
• Oscillation Dynamics in Short-Lived Facula Regions during Their Lifetime