Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...310l..33s&link_type=abstract
Astronomy and Astrophysics, v.310, p.L33-L36
Astronomy and Astrophysics
Astrophysics
50
Sun: Magnetic Fields, Sun: Infrared, Sun: Photosphere, Flux Tube
Scientific paper
The magnetic field in the solar photosphere is mainly composed of magnetic flux tubes. Their formation is not well understood, largely due to an absence of observational tests of theoretical predictions. Here we use infrared polarimetric data to test and confirm the prediction that whereas the field strength of large flux tubes is almost independent of their magnetic flux, small flux tubes show a strong dependence. Our work thus strengthens the case for convective collapse as the source of concentrated solar magnetic fields. We also present the first direct measurement of the intrinsic field strength of typical intranetwork elements. A significant fraction of them is in equipartition with the kinetic energy of convection. Nevertheless, our results suggest that as far as their internal structure is concerned intranetwork magnetic features are better described by flux tubes than by turbulent fields.
Kuhn Jeff R.
Lin Hainan
Rueedi I.
Solanki Sami K.
Zufferey D.
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