Possible Signature of Sausage Waves in Photospheric Bright Points

Document Type

Article

Publication Date

12-1-2021

Abstract

Sausage waves have been frequently reported in solar magnetic structures such as sunspots, pores, and coronal loops. However, they have not been unambiguously identified in photospheric bright points (BPs). Using high-resolution TiO image sequences obtained with the Goode Solar Telescope at the Big Bear Solar Observatory, we analyzed four isolated BPs. It was found that their area and average intensity oscillate for several cycles in an in-phase fashion. The oscillation periods range from 100 to 200 seconds. We interpreted the phase relation as a signature of sausage waves, particularly slow waves, after discussing sausage-wave theory and the opacity effect.

Identifier

85121519937 (Scopus)

Publication Title

Solar Physics

External Full Text Location

https://doi.org/10.1007/s11207-021-01928-9

e-ISSN

1573093X

ISSN

00380938

Issue

12

Volume

296

Grant

AGS-1821294

Fund Ref

National Science Foundation

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