Bibcode
Martínez González, M. J.; Asensio Ramos, A.; López Ariste, A.; Manso Sainz, R.
Bibliographical reference
Astronomy and Astrophysics, Volume 479, Issue 1, February III 2008, pp.229-234
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2
2008
Journal
Citations
45
Refereed citations
36
Description
Aims:The analysis of near infrared spectropolarimetric data at the
internetwork in different regions on the solar surface could offer
constraints that reject current modeling of these quiet areas. Methods: We present spectro-polarimetric observations of very quiet
regions for different values of the heliocentric angle for the Fe i
lines at 1.56 μm, from disc centre to positions close to the limb.
The spatial resolution of the data is 0.7{-}1''. We analyse direct
observable properties of the Stokes profiles as the amplitude of
circular and linear polarisation, as well as the total degree of
polarisation. The area and amplitude asymmetries are also studied. Results: We do not find any significant variation in the properties of
the polarimetric signals with the heliocentric angle. This means that
the magnetism of the solar internetwork remains the same regardless of
the position on the solar disc. This observational fact discards the
possibility of modeling the internetwork as a network-like scenario. The
magnetic elements of internetwork areas seem to be isotropically
distributed when observed at our spatial resolution.
Related projects
Magnetism, Polarization and Radiative Transfer in Astrophysics
Magnetic fields pervade all astrophysical plasmas and govern most of the variability in the Universe at intermediate time scales. They are present in stars across the whole Hertzsprung-Russell diagram, in galaxies, and even perhaps in the intergalactic medium. Polarized light provides the most reliable source of information at our disposal for the
Tanausú del
Pino Alemán