Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...227..591d&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 227, no. 2, Jan. 1990, p. 591-599. Research supported by the Accion Integrada
Astronomy and Astrophysics
Astrophysics
13
Faculae, Magnetic Fields, Polarimetry, Radiative Transfer, Spatial Resolution, Center Of Gravity, High Resolution, Magnetic Flux, Photosphere, Polarization (Waves)
Scientific paper
A new method to measure the magnetic field strength of small-scale solar magnetic concentrations is presented. It is based on the center of gravity method (Semel, 1967), is independent of radiative transfer calculations and only observable parameters are needed. This method also provides parameters like filling factor (area fraction occupied by the tubes), continuum intensity contrast between flux tubes and their surroundings, in a two-component model scheme. The method is applied to spectropolarimetric high spatial resolution data. Local variations of the above parameters inside single faculae are found. This result suggests some indications about flux tube evolution. A comparison with low spatial resolution results is also made.
Collados Manuel
Del Toro Iniesta Jose Carlos
Sánchez Almeida Jorge
Semel Meir
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