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Unravelling the Components of a Multi-Thermal Coronal Loop Using Magnetohydrodynamic Seismology

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dc.contributor.author Prasad, S. K
dc.contributor.author Jess, D. B
dc.contributor.author Klimchuk, J. A
dc.contributor.author Banerjee, D
dc.date.accessioned 2020-11-17T14:30:59Z
dc.date.available 2020-11-17T14:30:59Z
dc.date.issued 2017-01-10
dc.identifier.citation The Astrophysical Journal, Vol. 834, No. 2, 103 en_US
dc.identifier.issn 0004-637X
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7167
dc.description Restricted Access © The American Astronomical Society http://dx.doi.org/10.3847/1538-4357/834/2/103 en_US
dc.description.abstract Coronal loops, constituting the basic building blocks of the active Sun, serve as primary targets to help understand the mechanisms responsible for maintaining multi-million Kelvin temperatures in the solar and stellar coronae. Despite significant advances in observations and theory, our knowledge on the fundamental properties of these structures is limited. Here, we present unprecedented observations of accelerating slow magnetoacoustic waves along a coronal loop that show differential propagation speeds in two distinct temperature channels, revealing the multi-stranded and multithermal nature of the loop. Utilizing the observed speeds and employing nonlinear force-free magnetic field extrapolations, we derive the actual temperature variation along the loop in both channels, and thus are able to resolve two individual components of the multithermal loop for the first time. The obtained positive temperature gradients indicate uniform heating along the loop, rather than isolated footpoint heating. en_US
dc.language.iso en en_US
dc.publisher IOP Publishing en_US
dc.subject Magnetohydrodynamics (MHD) en_US
dc.subject Sun: corona en_US
dc.subject Sun: fundamental parameters en_US
dc.subject Sun: oscillations en_US
dc.subject Sunspots en_US
dc.title Unravelling the Components of a Multi-Thermal Coronal Loop Using Magnetohydrodynamic Seismology en_US
dc.type Article en_US


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