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Title: Spectropolarimetric Evidence for a Siphon Flow along an Emerging Magnetic Flux Tube

Abstract

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.

Authors:
;  [1]; ;  [2];  [3]; ; ; ; ; ; ;  [4];  [5];  [6];  [7]
  1. Instituto de Astrofísica de Canarias, Vía Láctea s/n, E-38205 La Laguna, Tenerife (Spain)
  2. Instituto de Astrofísica de Andalucía (CSIC), Apdo. de Correos 3004, E-18080 Granada (Spain)
  3. Grupo de Astronomía y Ciencias del Espacio, Universidad de Valencia, E-46980 Paterna, Valencia (Spain)
  4. Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, D-37077 Göttingen (Germany)
  5. Kiepenheuer-Institut für Sonnenphysik, Schöneckstr. 6, D-79104 Freiburg (Germany)
  6. National Solar Observatory, 3665 Discovery Drive, Boulder, CO 80303 (United States)
  7. High Altitude Observatory, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307-3000 (United States)
Publication Date:
OSTI Identifier:
22661233
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal, Supplement Series; Journal Volume: 229; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BALLOONS; CONCENTRATION RATIO; IRON IONS; MAGNETIC FIELDS; MAGNETIC FLUX; PHOTOSPHERE; POLARIMETRY; S CODES; SOLAR FLARES; SPATIAL RESOLUTION; SPINORS; SUN; TOPOLOGY; VELOCITY

Citation Formats

Requerey, Iker S., Cobo, B. Ruiz, Iniesta, J. C. Del Toro, Suárez, D. Orozco, Rodríguez, J. Blanco, Solanki, S. K., Barthol, P., Gandorfer, A., Gizon, L., Hirzberger, J., Riethmüller, T. L., Noort, M. van, Schmidt, W., Pillet, V. Martínez, and Knölker, M., E-mail: iker@iac.es. Spectropolarimetric Evidence for a Siphon Flow along an Emerging Magnetic Flux Tube. United States: N. p., 2017. Web. doi:10.3847/1538-4365/229/1/15.
Requerey, Iker S., Cobo, B. Ruiz, Iniesta, J. C. Del Toro, Suárez, D. Orozco, Rodríguez, J. Blanco, Solanki, S. K., Barthol, P., Gandorfer, A., Gizon, L., Hirzberger, J., Riethmüller, T. L., Noort, M. van, Schmidt, W., Pillet, V. Martínez, & Knölker, M., E-mail: iker@iac.es. Spectropolarimetric Evidence for a Siphon Flow along an Emerging Magnetic Flux Tube. United States. doi:10.3847/1538-4365/229/1/15.
Requerey, Iker S., Cobo, B. Ruiz, Iniesta, J. C. Del Toro, Suárez, D. Orozco, Rodríguez, J. Blanco, Solanki, S. K., Barthol, P., Gandorfer, A., Gizon, L., Hirzberger, J., Riethmüller, T. L., Noort, M. van, Schmidt, W., Pillet, V. Martínez, and Knölker, M., E-mail: iker@iac.es. Wed . "Spectropolarimetric Evidence for a Siphon Flow along an Emerging Magnetic Flux Tube". United States. doi:10.3847/1538-4365/229/1/15.
@article{osti_22661233,
title = {Spectropolarimetric Evidence for a Siphon Flow along an Emerging Magnetic Flux Tube},
author = {Requerey, Iker S. and Cobo, B. Ruiz and Iniesta, J. C. Del Toro and Suárez, D. Orozco and Rodríguez, J. Blanco and Solanki, S. K. and Barthol, P. and Gandorfer, A. and Gizon, L. and Hirzberger, J. and Riethmüller, T. L. and Noort, M. van and Schmidt, W. and Pillet, V. Martínez and Knölker, M., E-mail: iker@iac.es},
abstractNote = {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.},
doi = {10.3847/1538-4365/229/1/15},
journal = {Astrophysical Journal, Supplement Series},
number = 1,
volume = 229,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 2017},
month = {Wed Mar 01 00:00:00 EST 2017}
}