Low-lying magnetic loops in the solar internetwork

Details Low-lying magnetic loops in the solar internetwork Low-lying magnetic loops in the solar internetwork

2007-05-09

arxiv.org/abs/0705.1319v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in A&A letters

Scientific paper

10.1051/0004-6361:20077505

The aim of this work is to study the structure of the magnetic field vector in the internetwork and search for the presence of small-scale loops. We invert 1.56 micron spectropolarimetric observations of internetwork regions at disc centre by applying the SIR code. This allows us to recover the atmospheric parameters that play a role in the formation of these spectral lines. We are mainly interested in the structure of the magnetic field vector. We find that many opposite polarity elements of the internetwork are connected by short (2-6''), low-lying (photospheric) loops. These loops connect at least the 10-20 % of the internetwork flux visible in our data. Also we have some evidence that points towards a dynamic scenario which can be produced by the emergence of internetwork magnetic flux.

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