Scattering Polarization in Solar Flares

0399519 - ASÚ 2014 RIV US eng J - Článek v odborném periodiku
Štěpán, Jiří - Heinzel, Petr
Scattering Polarization in Solar Flares.
Astrophysical Journal Letters. Roč. 778, č. 1 (2013), L6/1-L6/6. ISSN 2041-8205. E-ISSN 2041-8213
Grant CEP: GA ČR GAP209/12/1652; GA ČR GPP209/12/P741
Institucionální podpora: RVO:67985815
Klíčová slova: line formation * polarization * radiative transfer
Kód oboru RIV: BN - Astronomie a nebeská mechanika, astrofyzika
Impakt faktor: 5.602, rok: 2013

In this work, we study the possible role of resonance line polarization due to radiation anisotropy in the inhomogeneous medium of the flare ribbons. We consider a simple two-dimensional model of the flaring chromosphere and we self-consistently solve the non-LTE problem taking into account the role of resonant scattering polarization and of the Hanle effect. Our calculations show that the horizontal plasma inhomogeneities at the boundary of the flare ribbons can lead to a significant radiation anisotropy in the line formation region and, consequently, to a fractional linear polarization of the emergent radiation of the order of several percent.
Trvalý link: http://hdl.handle.net/11104/0226756