scholarly journals ELLERMAN BOMBS—EVIDENCE FOR MAGNETIC RECONNECTION IN THE LOWER SOLAR ATMOSPHERE

2013 ◽  
Vol 779 (2) ◽  
pp. 125 ◽  
Author(s):  
C. J. Nelson ◽  
S. Shelyag ◽  
M. Mathioudakis ◽  
J. G. Doyle ◽  
M. S. Madjarska ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
Solar Atmosphere ◽  
Lower Solar Atmosphere ◽  
Ellerman Bombs

scholarly journals Magnetic reconnection resulting from flux emergence: implications for jet formation in the lower solar atmosphere?

2011 ◽  
Vol 535 ◽  
pp. A95 ◽  
Author(s):  
J. Y. Ding ◽  
M. S. Madjarska ◽  
J. G. Doyle ◽  
Q. M. Lu ◽  
K. Vanninathan ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
Solar Atmosphere ◽  
Flux Emergence ◽  
Jet Formation ◽  
Lower Solar Atmosphere

scholarly journals Signatures of ubiquitous magnetic reconnection in the lower solar atmosphere

2020 ◽  
Vol 641 ◽  
pp. L5
Author(s):  
Jayant Joshi ◽  
Luc H. M. Rouppe van der Voort ◽  
Jaime de la Cruz Rodríguez
Keyword(s):  
Magnetic Reconnection ◽  
Solar Atmosphere ◽  
Solar Limb ◽  
Small Scale ◽  
Balmer Line ◽  
Solar Chromosphere ◽  
Quiet Sun ◽  
Single Moment ◽  
Order Of Magnitude ◽  
Lower Solar Atmosphere

Ellerman Bomb-like brightenings of the hydrogen Balmer line wings in the quiet Sun, also known as quiet Sun Ellerman bombs (QSEBs), are a signature of the fundamental process of magnetic reconnection at the smallest observable scale in the lower solar atmosphere. We analyze high spatial resolution observations (0.″1) obtained with the Swedish 1-m Solar Telescope to explore signatures of QSEBs in the Hβ line. We find that QSEBs are ubiquitous and uniformly distributed throughout the quiet Sun, predominantly occurring in intergranular lanes. We find up to 120 QSEBs in the field of view for a single moment in time; this is more than an order of magnitude higher than the number of QSEBs found in earlier Hα observations. This suggests that about half a million QSEBs could be present in the lower solar atmosphere at any given time. The QSEB brightenings found in the Hβ line wings also persist in the line core with a temporal delay and spatial offset toward the nearest solar limb. Our results suggest that QSEBs emanate through magnetic reconnection along vertically extended current sheets in the lower solar atmosphere. The apparent omnipresence of small-scale magnetic reconnection may play an important role in the energy balance of the solar chromosphere.

Numerical simulations of magnetic reconnection in the lower solar atmosphere

2011 ◽  
Vol 11 (2) ◽  
pp. 225-236 ◽  
Author(s):  
Xiao-Yan Xu ◽  
Cheng Fang ◽  
Ming-De Ding ◽  
Dan-Hui Gao
Keyword(s):  
Numerical Simulations ◽  
Magnetic Reconnection ◽  
Solar Atmosphere ◽  
Lower Solar Atmosphere

scholarly journals A White-light Flare Powered by Magnetic Reconnection in the Lower Solar Atmosphere

2020 ◽  
Vol 893 (1) ◽  
pp. L13 ◽  
Author(s):  
Yongliang Song ◽  
Hui Tian ◽  
Xiaoshuai Zhu ◽  
Yajie Chen ◽  
Mei Zhang ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
Solar Atmosphere ◽  
White Light ◽  
Lower Solar Atmosphere

The Characteristics of Thin Magnetic Flux Tubes in the Lower Solar Atmosphere Observed byHinode/SOT in the G band and in Ca ii H Bright Points

2017 ◽  
Vol 851 (1) ◽  
pp. 42 ◽  
Author(s):  
Jianping Xiong ◽  
Yunfei Yang ◽  
Chunlan Jin ◽  
Kaifan Ji ◽  
Song Feng ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Solar Atmosphere ◽  
Flux Tubes ◽  
Magnetic Flux Tubes ◽  
Lower Solar Atmosphere

Estimation of the Energy Flux of Torsional Alfvén Waves in the Lower Solar Atmosphere Based on Measurements of the Doppler Velocities

2021 ◽  
Vol 61 (7) ◽  
pp. 1035-1037
Author(s):  
Yu. T. Tsap ◽  
A. V. Stepanov ◽  
Yu. G. Kopylova ◽  
O. V. Khaneychuk ◽  
T. B. Goldvarg
Keyword(s):  
Solar Atmosphere ◽  
Energy Flux ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Lower Solar Atmosphere

scholarly journals Numerical simulations of the lower solar atmosphere heating by two-fluid nonlinear Alfvén waves

2020 ◽  
Vol 639 ◽  
pp. A45
Author(s):  
B. Kuźma ◽  
D. Wójcik ◽  
K. Murawski ◽  
D. Yuan ◽  
S. Poedts
Keyword(s):  
Magnetic Flux ◽  
Numerical Simulations ◽  
Solar Atmosphere ◽  
Flux Tube ◽  
Alfven Waves ◽  
Alfven Wave ◽  
Magnetic Flux Tube ◽  
Alfvén Waves ◽  
Two Fluid ◽  
Lower Solar Atmosphere

Context. We present new insight into the long-standing problem of plasma heating in the lower solar atmosphere in terms of collisional dissipation caused by two-fluid Alfvén waves. Aims. Using numerical simulations, we study Alfvén wave propagation and dissipation in a magnetic flux tube and their heating effect. Methods. We set up 2.5-dimensional numerical simulations with a semi-empirical model of a stratified solar atmosphere and a force-free magnetic field mimicking a magnetic flux tube. We consider a partially ionized plasma consisting of ion + electron and neutral fluids, which are coupled by ion-neutral collisions. Results. We find that Alfvén waves, which are directly generated by a monochromatic driver at the bottom of the photosphere, experience strong damping. Low-amplitude waves do not thermalize sufficient wave energy to heat the solar atmospheric plasma. However, Alfvén waves with amplitudes greater than 0.1 km s−1 drive through ponderomotive force magneto-acoustic waves in higher atmospheric layers. These waves are damped by ion-neutral collisions, and the thermal energy released in this process leads to heating of the upper photosphere and the chromosphere. Conclusions. We infer that, as a result of ion-neutral collisions, the energy carried initially by Alfvén waves is thermalized in the upper photosphere and the chromosphere, and the corresponding heating rate is large enough to compensate radiative and thermal-conduction energy losses therein.

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