Open AccessCoupling effects throughout the solar atmosphere: Emerging magnetic flux and structure formation
Author(s) -
Ryutova M.,
Shine R.
Publication year - 2006
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2005ja011422
Subject(s) - chromosphere , physics , solar telescope , magnetic flux , coronal hole , coronal loop , nanoflares , photosphere , plasma , flux (metallurgy) , corona (planetary geology) , magnetogram , magnetic field , coronal mass ejection , astrophysics , solar wind , telescope , materials science , astrobiology , quantum mechanics , venus , metallurgy
We report observations of the “birth,” formation, and evolution of compact coronal structures associated with strong localized motions generated by emerging magnetic flux in the photosphere. We use multiwavelength time series of data taken simultaneously with the Swedish Vacuum Solar Telescope (SVST) on La Palma, the TRACE satellite, and the MDI instrument on SOHO. We find that long before the magnetic pore is formed, the chromosphere and transition region show a high activity above the future site of pore formation: rising but not yet visible magnetic flux exerts a strong pressure on the overlying plasma generating highly collimated plasma flows seen in the H α images. About the time when the magnetic pores are formed and the H α surges bifurcate into the established arc‐like flows, a system of compact coronal loops is formed, showing direct connection between the motions associated with the evolving magnetic fields and the coronal structure formation. We propose a mechanism that may lead to the observed phenomena based on the generation of currents by strong disturbances propagating upward from a limited surface area.