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Spectropolarimetric evidence for a siphon flow along an emerging magnetic flux tube

AuthorsRequerey, Iker S.; Ruiz Cobo, B.; Toro, José Carlos del ; Orozco Suárez, David ; Blanco Rodríguez, J.; Solanki, S. K.; Barthol, P.; Gandorfer, A.; Gizon, L.; Hirzberger, J.
KeywordsMethods: observational
Sun: magnetic fields
Sun: photosphere
Techniques: polarimetric
Issue Date22-Feb-2017
PublisherAmerican Astronomical Society
Institute of Physics (Great Britain)
CitationAstrophysical Journal - Supplement Series 229(1): 15 (2017)
Abstract©2017 The American Astronomical Society. All rights reserved.We study the dynamics and topology of an emerging magnetic flux concentration using high spatial resolution spectropolarimetric data acquired with the Imaging Magnetograph eXperiment on board the sunrise balloon-borne solar observatory. We obtain the full vector magnetic field and the line of sight (LOS) velocity through inversions of the Fe i line at 525.02 nm with the SPINOR code. The derived vector magnetic field is used to trace magnetic field lines. Two magnetic flux concentrations with different polarities and LOS velocities are found to be connected by a group of arch-shaped magnetic field lines. The positive polarity footpoint is weaker (1100 G) and displays an upflow, while the negative polarity footpoint is stronger (2200 G) and shows a downflow. This configuration is naturally interpreted as a siphon flow along an arched magnetic flux tube.
Publisher version (URL)https://doi.org/10.3847/1538-4365/229/1/15
Appears in Collections:(IAA) Artículos
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