Brueckner Events Oscillations in Solar Transition Region

We study Brueckner event Oscillations in Solar Transition Region (TR), with simultaneous observations from the Si IV 1402 Å spectra and slit-jaw images (SJI) 1400 Å based on the Interface Region Imaging Spectrograph (IRIS) on 2014 August 17, and January 27. Study of these events can significantly he...

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Main Authors: Sima Zeighami, Ehsan Tavabi
Format: Article
Language:English
Published: Damghan university 2021-07-01
Series:Iranian Journal of Astronomy and Astrophysics
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Online Access:https://ijaa.du.ac.ir/article_256_207bde8cca5b79e6bf77d08d97df23a6.pdf
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author Sima Zeighami
Ehsan Tavabi
author_facet Sima Zeighami
Ehsan Tavabi
author_sort Sima Zeighami
collection DOAJ
description We study Brueckner event Oscillations in Solar Transition Region (TR), with simultaneous observations from the Si IV 1402 Å spectra and slit-jaw images (SJI) 1400 Å based on the Interface Region Imaging Spectrograph (IRIS) on 2014 August 17, and January 27. Study of these events can significantly help us for understanding the mechanisms of the mass and energy transporting from chromosphere toward TR and corona. We obtained intensity profiles from spectrum perpendicular to the slit in three altitudes from the limb, and then by fitting Gaussian intensity profiles, the transverse fluctuations up to 3200 km altitude along the slit were computed. We observed that Si IV spectra shows blue and red wing enhancements in the line profiles indicating upward and downward twisted. Average of Doppler velocities in the first and second data for the three altitudes were obtained 35 and 80 km/s respectively. The results of wavelet analysis of fluctuations revealed dominant periods of 1.5, 3, 5 minutes. According to our results, it was suggested that the fluctuations in the Brueckner events with one wing enhancement and both wing enhancements, illustrated the swaying and rotational motions of spicules over their axes, respectively. The swaying and rotating motions are responsible for kink and twisted Alfvenic supper and hyper sonic waves propagations, respectively.
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institution Kabale University
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publishDate 2021-07-01
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series Iranian Journal of Astronomy and Astrophysics
spelling doaj-art-56d241c7daa34362893cc1f34b578aa02025-01-12T10:10:12ZengDamghan universityIranian Journal of Astronomy and Astrophysics2322-49242383-403X2021-07-0182719010.22128/ijaa.2021.495.1106256Brueckner Events Oscillations in Solar Transition RegionSima Zeighami0Ehsan Tavabi1Department of Physics, Tabriz Branch, Islamic Azad University, Tabriz, IranPhysics Department, Payame Noor University (PNU), 19395-3697-Tehran, I. R. of IranWe study Brueckner event Oscillations in Solar Transition Region (TR), with simultaneous observations from the Si IV 1402 Å spectra and slit-jaw images (SJI) 1400 Å based on the Interface Region Imaging Spectrograph (IRIS) on 2014 August 17, and January 27. Study of these events can significantly help us for understanding the mechanisms of the mass and energy transporting from chromosphere toward TR and corona. We obtained intensity profiles from spectrum perpendicular to the slit in three altitudes from the limb, and then by fitting Gaussian intensity profiles, the transverse fluctuations up to 3200 km altitude along the slit were computed. We observed that Si IV spectra shows blue and red wing enhancements in the line profiles indicating upward and downward twisted. Average of Doppler velocities in the first and second data for the three altitudes were obtained 35 and 80 km/s respectively. The results of wavelet analysis of fluctuations revealed dominant periods of 1.5, 3, 5 minutes. According to our results, it was suggested that the fluctuations in the Brueckner events with one wing enhancement and both wing enhancements, illustrated the swaying and rotational motions of spicules over their axes, respectively. The swaying and rotating motions are responsible for kink and twisted Alfvenic supper and hyper sonic waves propagations, respectively.https://ijaa.du.ac.ir/article_256_207bde8cca5b79e6bf77d08d97df23a6.pdftrbrueckner eventscoronal heatingtwistedwavelet
spellingShingle Sima Zeighami
Ehsan Tavabi
Brueckner Events Oscillations in Solar Transition Region
Iranian Journal of Astronomy and Astrophysics
tr
brueckner events
coronal heating
twisted
wavelet
title Brueckner Events Oscillations in Solar Transition Region
title_full Brueckner Events Oscillations in Solar Transition Region
title_fullStr Brueckner Events Oscillations in Solar Transition Region
title_full_unstemmed Brueckner Events Oscillations in Solar Transition Region
title_short Brueckner Events Oscillations in Solar Transition Region
title_sort brueckner events oscillations in solar transition region
topic tr
brueckner events
coronal heating
twisted
wavelet
url https://ijaa.du.ac.ir/article_256_207bde8cca5b79e6bf77d08d97df23a6.pdf
work_keys_str_mv AT simazeighami bruecknereventsoscillationsinsolartransitionregion
AT ehsantavabi bruecknereventsoscillationsinsolartransitionregion