FLOWS AND WAVES IN BRAIDED SOLAR CORONAL MAGNETIC STRUCTURES

ABSTRACT We study the high frequency dynamics in the braided magnetic structure of an active region (AR 11520) moss as observed by the High-Resolution Coronal Imager (Hi-C). We detect quasi-periodic flows and waves in these structures. We search for high frequency dynamics while looking at power map...

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Bibliographic Details
Published in:Astrophysical journal. Letters 2015-03, Vol.801 (1), p.1-7
Main Authors: Pant, V., Datta, A., Banerjee, D.
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
Braiding
Coronas
Dynamics
High frequencies
INTERPLANETARY MAGNETIC FIELDS
Magnetic structure
Moss
OSCILLATIONS
PERIODICITY
PLASMA
RESOLUTION
SOLAR CORONA
SUN
Sun: corona
Sun: oscillations
Sun: UV radiation
ULTRAVIOLET RADIATION
VELOCITY
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Summary:ABSTRACT We study the high frequency dynamics in the braided magnetic structure of an active region (AR 11520) moss as observed by the High-Resolution Coronal Imager (Hi-C). We detect quasi-periodic flows and waves in these structures. We search for high frequency dynamics while looking at power maps of the observed region. We find that shorter periodicities (30-60 s) are associated with small spatial scales which can be resolved by Hi-C only. We detect quasi-periodic flows with a wide range of velocities, from 13-185 km s−1, associated with braided regions. This can be interpreted as plasma outflows from reconnection sites. We also find short period and large amplitude transverse oscillations associated with the braided magnetic region. Such oscillations could be triggered by reconnection or such oscillations may trigger reconnection.
ISSN:2041-8205
2041-8213
2041-8213
DOI:10.1088/2041-8205/801/1/L2