Polarized Kink Waves in Magnetic Elements: Evidence for Chromospheric Helical Waves

被引:25
作者
Stangalini, M. [1 ]
Giannattasio, F. [1 ,2 ]
Erdelyi, R. [3 ]
Jafarzadeh, S. [4 ]
Consolini, G. [2 ]
Criscuoli, S. [5 ]
Ermolli, I. [2 ]
Guglielmino, S. L. [6 ]
Zuccarello, F. [6 ]
机构
[1] INAF OAR Natl Inst Astrophys, Via Frascati 33, I-00078 Monte Porzio Catone, RM, Italy
[2] INAF IAPS Natl Inst Astrophys, Via Fosso Cavaliere 100, I-00133 Rome, Italy
[3] Univ Sheffield, Sch Math & Stat, Solar Phys & Space Plasma Res Ctr SP2RC, Sheffield S3 7RH, S Yorkshire, England
[4] Univ Oslo, Inst Theoret Astrophys, POB 1029, NO-0315 Oslo, Norway
[5] Natl Solar Observ, Boulder, CO 80303 USA
[6] Univ Catania, Dept Phys & Astron, Via S Sofia 78, I-95125 Catania, Italy
关键词
magnetohydrodynamics (MHD); Sun: chromosphere; Sun: oscillations; EMPIRICAL MODE DECOMPOSITION; LONGITUDINAL TUBE WAVES; H BRIGHT POINTS; SOLAR ATMOSPHERE; FLUX TUBES; QUIET-SUN; ALFVENIC WAVES; OSCILLATIONS; PROPAGATION; CONVECTION;
D O I
10.3847/1538-4357/aa6c5e
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
In recent years, new high spatial resolution observations of the Sun's atmosphere have revealed the presence of a plethora of small-scale magnetic elements down to the resolution limit of. the current cohort of solar telescopes (similar to 100-120 km on the solar photosphere). These small magnetic field concentrations, due to the granular buffeting, can support and guide several magnetohydrodynamic wave modes that would eventually contribute to the energy budget of the upper layers of the atmosphere. In this work, exploiting the high spatial and temporal resolution chromospheric data acquired with the Swedish 1 m Solar Telescope, and applying the empirical mode decomposition technique to the tracking of the solar magnetic features, we analyze the perturbations of the horizontal velocity vector of a set of chromospheric magnetic elements. We find observational evidence that suggests a phase relation between the two components of the velocity vector itself, resulting in its helical motion.
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页数:8
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