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On the Probable Existence of an Abrupt Magnetization in the Upper Chromosphere of the Quiet Sun
- 1.0355114 - ASÚ 2011 RIV US eng J - Journal Article
Štěpán, Jiří - Trujillo Bueno, J.
On the Probable Existence of an Abrupt Magnetization in the Upper Chromosphere of the Quiet Sun.
Astrophysical Journal Letters. Roč. 711, č. 2 (2010), L133-L137. ISSN 2041-8205. E-ISSN 2041-8213
Institutional research plan: CEZ:AV0Z10030501
Keywords : magnetic fields * polarization * radiative transfer
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics
Impact factor: 1.020, year: 2010
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.
Permanent Link: http://hdl.handle.net/11104/0193957
Number of the records: 1