On the Probable Existence of an Abrupt Magnetization in the Upper Chromosphere of the Quiet Sun

Bibcode
2010ApJ...711L.133S
DOI
10.1088/2041-8205/711/2/L133
Štěpán, J.; Trujillo-Bueno, J.
Bibliographical reference

The Astrophysical Journal Letters, Volume 711, Issue 2, pp. L133-L137 (2010).

Advertised on:
3
2010
Number of authors
2
IAC number of authors
2
Citations
20
Refereed citations
11
Description
We report on a detailed radiative transfer modeling of the observed scattering polarization in the Hα line, which allows us to infer quantitative information on the magnetization of the quiet solar chromosphere. Our analysis suggests the presence of a magnetic complexity zone with a mean field strength langBrang > 30 G lying just below the sudden transition region to the coronal temperatures. The chromospheric plasma directly underneath is very weakly magnetized, with langBrang ~ 1 G. The possible existence of this abrupt change in the degree of magnetization of the upper chromosphere of the quiet Sun might have large significance for our understanding of chromospheric (and, therefore, coronal) heating.
Related projects
Project Image
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
In progress
Type
Refereed
Solar Physics (FS)
Magnetic fields
Radiative transfer

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