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

DOI: 
10.3847/1538-4365/229/1/15
Publication date: 
17/04/2017
Main author: 
Requerey I.S.
IAA authors: 
Requerey, I.S.;Iniesta, J.C.D.T.;Suárez, D.O.
Authors: 
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 M.
Journal: 
Astrophysical Journal, Supplement Series
Refereed: 
Yes
Publication type: 
Article
Volume: 
229
Pages: 
15
Number: 
15
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. © 2017. The American Astronomical Society. All rights reserved.

Database: 
SCOPUS
ADS
URL: 
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85016163333&doi=10.3847%2f1538-4365%2f229%2f1%2f15&partnerID=40&md5=0090e2fae641e5a79a4d6d3b2586fbc4
ADS Bibcode: 
2017ApJS..229...15R
Keywords: 
methods: observational; Sun: magnetic fields; Sun: photosphere; techniques: polarimetric