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Simultaneous longitudinal and transverse oscillations in filament threads after a failed eruption

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dc.contributor.author Rakesh Mazumder
dc.contributor.author Vaibhav Pant
dc.contributor.author Manuel Luna
dc.contributor.author Dipankar Banerjee
dc.date.accessioned 2020-11-26T15:39:48Z
dc.date.available 2020-11-26T15:39:48Z
dc.date.issued 2019-11
dc.identifier.citation Astronomy & Astrophysics, Vol. 633, A12 en_US
dc.identifier.issn 0004-6361
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7408
dc.description Restricted Access © ESO https://www.aanda.org/articles/aa/pdf/2020/01/aa36453-19.pdf en_US
dc.description.abstract Longitudinal and transverse oscillations are frequently observed in the solar prominences and / or filaments. These oscilla- tions are excited by a large-scale shock wave, impulsive flares at one leg of the filament threads, or due to any low coronal eruptions. We report simultaneous longitudinal and transverse oscillations in the filament threads of a quiescent region filament. We observe a large filament in the northwest of the solar disk on July 6, 2017. On July 7, 2017, it starts rising around 13:00 UT. We then observe a failed eruption and subsequently the filament threads start to oscillate around 16:00 UT. Aims. We analyse oscillations in the threads of a filament and utilize seismology techniques to estimate magnetic field strength and length of filament threads. Methods. We placed horizontal and vertical artificial slits on the filament threads to capture the longitudinal and transverse oscil- lations of the threads. Data from Atmospheric Imaging Assembly onboard Solar Dynamics Observatory were used to detect the oscillations. Results. We find signatures of large-amplitude longitudinal oscillations (LALOs). We also detect damping in LALOs. In one thread of the filament, we observe large-amplitude transverse oscillations (LATOs). Using the pendulum model, we estimate the lower limit of magnetic field strength and radius of curvature from the observed parameter of LALOs. Conclusions. We show the co-existence of two di ff erent wave modes in the same filament threads. We estimate magnetic field from LALOs and suggest a possible range of the length of the filament threads using LATOs. en_US
dc.language.iso en en_US
dc.publisher EDP Sciences en_US
dc.subject Sun: oscillations en_US
dc.subject Sun: filaments, prominences en_US
dc.subject Sun: chromosphere en_US
dc.title Simultaneous longitudinal and transverse oscillations in filament threads after a failed eruption en_US
dc.type Article en_US


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