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High-Frequency Dynamics of Active Region Moss as Observed by IRIS

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dc.contributor.author Narang, Nancy
dc.contributor.author Pant, V
dc.contributor.author Banerjee, D
dc.contributor.author Doorsselaere, Tom Van
dc.date.accessioned 2020-11-26T15:02:27Z
dc.date.available 2020-11-26T15:02:27Z
dc.date.issued 2019-05-16
dc.identifier.citation Frontiers in Astronomy and Space Sciences, Vol. 6, 36. en_US
dc.identifier.issn 2296-987X
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7355
dc.description Open Access en_US
dc.description.abstract The high temporal, spatial and spectral resolution of Interface Region Imaging Spectrograph (IRIS) has provided new insights into the understanding of different small-scale processes occurring at the chromospheric and transition region (TR) heights. We study the dynamics of high-frequency oscillations of active region (AR 2376) moss as recorded by simultaneous imaging and spectral data of IRIS. Wavelet transformation, power maps generated from slit-jaw images in the Si IV 1400 Å passband, and sit-and-stare spectroscopic observations of the Si IV 1403 Å spectral line reveal the presence of high-frequency oscillations with ~1–2 min periods in the bright moss regions. The presence of such low periodicities is further confirmed by intrinsic mode functions (IMFs) as obtained by the empirical mode decomposition (EMD) technique. We find evidence of the presence of slow waves and reconnection-like events, and together they cause the high-frequency oscillations in the bright moss regions. en_US
dc.language.iso en en_US
dc.publisher Frontiers en_US
dc.relation.uri https://doi.org/10.3389/fspas.2019.00036
dc.rights © Frontiers
dc.subject sun en_US
dc.subject chromopshere en_US
dc.subject transition region en_US
dc.subject oscillations en_US
dc.subject MHD wave en_US
dc.title High-Frequency Dynamics of Active Region Moss as Observed by IRIS en_US
dc.type Article en_US


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