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

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.

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Author Requerey, I. S.
Cobo, B. R.
Iniesta, J. C. D. T.
Suárez, D. O.
Rodríguez, J. B.
Solanki, S. K.
Barthol, P.
Gandorfer, A.
Gizon, L.
Hirzberger, J.
Riethmüller, T. L.
Noort, M. v.
Schmidt, W.
Pillet, V. M.
Knölker, Michael
Publisher UCAR/NCAR - Library
Publication Date 2017-03-24T00:00:00
Digital Object Identifier (DOI) Not Assigned
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Topic Category geoscientificInformation
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Metadata Date 2025-07-11T19:50:25.013639
Metadata Record Identifier edu.ucar.opensky::articles:19683
Metadata Language eng; USA
Suggested Citation Requerey, I. S., Cobo, B. R., Iniesta, J. C. D. T., Suárez, D. O., Rodríguez, J. B., Solanki, S. K., Barthol, P., Gandorfer, A., Gizon, L., Hirzberger, J., Riethmüller, T. L., Noort, M. v., Schmidt, W., Pillet, V. M., Knölker, Michael. (2017). Spectropolarimetric evidence for a siphon flow along an emerging magnetic flux tube. UCAR/NCAR - Library. https://n2t.org/ark:/85065/d70g3mz3. Accessed 02 November 2025.

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