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 polarity 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.

Accepted for publication in ApJS

References in corpus (5)

• Emergence of Small-Scale Magnetic Loops in the Quiet Sun Internetwork
• The second flight of the SUNRISE balloon-borne solar observatory: overview of instrument updates, the flight, the data and first results
• Low-lying magnetic loops in the solar internetwork
• Temporal relation between quiet-Sun transverse fields and the strong flows detected by IMaX/SUNRISE
• High speed magnetized flows in the quiet Sun

Cited by in corpus (4)

• The second flight of the SUNRISE balloon-borne solar observatory: overview of instrument updates, the flight, the data and first results
• Solar Coronal Loops Associated with Small-scale Mixed Polarity Surface Magnetic Fields
• A Tale of Two Emergences: Sunrise II Observations of Emergence Sites in a Solar Active Region
• Magnetic connectivity between the light bridge and penumbra in a sunspot