000007696 001__ 7696
000007696 005__ 20260105150733.0
000007696 0247_ $$2DOI$$a10.1051/0004-6361/202452925
000007696 037__ $$aSCART-2026-0004
000007696 100__ $$aPetrova, E.  
000007696 245__ $$aTransverse waves observed in a fibril with the MiHI prototype
000007696 260__ $$c2025
000007696 520__ $$aContext. Fine-scale structures of the solar chromosphere, particularly fibrils, are known to host various types of magnetohydrodynamic (MHD) waves that can transport energy to the corona. In particular, absorption features observed in the Hα channel have been widely detected that exhibit transverse oscillations. Aims. We aimed to detect a high-frequency transverse oscillation in fibrils. Methods. We conducted a case study on a high-frequency transverse oscillation in a chromospheric fibril. A chromospheric fibril was observed on 24 August 2018, in the Hα spectral line, with the prototype Microlensed Hyperspectral Imager (MiHI) at the Swedish 1-meter Solar Telescope. The MiHI instrument is an integral field spectrograph capable of achieving ultra-high resolution simultaneously in the spatial, temporal, and spectral domains. Results. The detected oscillation characteristics include a period of 15 s and a displacement amplitude of 42 km. Using the bisector method, we derived Doppler velocities and determined that the polarisation of the oscillation was elliptical. Conclusions. The energy contained in the oscillation ranges from 390 to 2300 W/m2, which is not sufficient to balance radiative losses of the chromosphere.
000007696 594__ $$aSTCE
000007696 6531_ $$atransverse waves
000007696 6531_ $$achromosphere
000007696 6531_ $$aMicrolensed Hyperspectral Imager 
000007696 6531_ $$aSST
000007696 700__ $$aVan Doorsselaere, T.  
000007696 700__ $$avan Noort, M. 
000007696 700__ $$aBerghmans, D. 
000007696 700__ $$aCastellanos Durán, J. S.  
000007696 773__ $$nid.A168$$pAstronomy & Astrophysics$$v697$$y2025
000007696 8560_ $$fdavid.berghmans@ksb-orb.be
000007696 85642 $$ahttps://www.aanda.org/articles/aa/full_html/2025/05/aa52925-24/aa52925-24.html
000007696 85642 $$ahttps://arxiv.org/abs/2504.21857
000007696 905__ $$apublished in
000007696 980__ $$aREFERD