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MHD Seismology of a loop-like filament tube by observed kink waves

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dc.contributor.author Pant, V
dc.contributor.author Srivastava, A. K
dc.contributor.author Banerjee, D
dc.contributor.author Goossens, M
dc.contributor.author Chen, P.-F
dc.contributor.author Joshi, N. C
dc.contributor.author Zhou, Y.-H
dc.date.accessioned 2020-11-17T02:40:47Z
dc.date.available 2020-11-17T02:40:47Z
dc.date.issued 2015-10
dc.identifier.citation Research in Astronomy and Astrophysics, Vol. 15, No. 10, pp. 1713-1724 en_US
dc.identifier.issn 1674-4527
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7043
dc.description Open Access © IOP Publishing http://dx.doi.org/10.1088/1674-4527/15/10/008 en_US
dc.description.abstract We report and analyze observational evidence of global kink oscillations in a solar filament as observed in Hα by instruments administered by National Solar Observatory (NSO)/Global Oscillation Network Group (GONG). An M1.1-class flare in active region (AR) 11692 occurred on 2013 March 15 and induced a global kink mode in the filament lying towards the southwest of AR 11692. We find periods of about 61–67 minutes and damping times of 92–117 minutes at positions of three vertical slices chosen in and around the filament apex. We find that the waves are damped. From the observed period of the global kink mode and damping timescale using the theory of resonant absorption, we perform prominence seismology. We estimate a lower cut-off value for the inhomogeneity length scale to be around 0.34–0.44 times the radius of the filament cross-section. en_US
dc.language.iso en en_US
dc.publisher IOP Publishing en_US
dc.subject Sun: oscillations en_US
dc.subject Sun: magnetic fields en_US
dc.subject Sun: filament en_US
dc.title MHD Seismology of a loop-like filament tube by observed kink waves en_US
dc.type Article en_US


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