Year: 2026
Type: article
Abstract: Chromospheric fibrils are ubiquitous dynamical structures that can support magnetohydrodynamic waves and may contribute to energy transport in the solar atmosphere. Using high-resolution observations from the Visible Broadband Imager (VBI) onboard the Daniel K. Inouye Solar Telescope (DKIST), we investigate transverse oscillations of H α fibrils. Our observations encompass both quiet-Sun (QS) and active regions. The results reveal that high-frequency transverse oscillations are highly prevalent in fibrils across different magnetic environments. The detected oscillations exhibit typical periods of 56 ± 49 s, displacement amplitudes of 37 ± 25 km, velocity amplitudes of 6 ± 4 km s −1 , and phase velocities of 21 ± 13 km s −1 . Under typical chromospheric conditions, the estimated wave energy flux ranges from 20 to 200 W m −2 . The characteristics of these transverse oscillations are consistent with those of Alfvénic kink-mode waves. Our results reveal the existence of the high-frequency, small-amplitude transverse waves in chromospheric fibrils and provide new constraints on their contribution to the chromospheric and coronal heating.
Source: The Astrophysical Journal
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,499
OpenAlex ID: W7221998039