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Blend lines in the polarized spectrum of the Sun

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dc.contributor.author Sowmya, K
dc.contributor.author Nagendra, K. N
dc.contributor.author Sampoorna, M
dc.date.accessioned 2012-05-21T13:20:18Z
dc.date.available 2012-05-21T13:20:18Z
dc.date.issued 2012-07
dc.identifier.citation Monthly Notices of the Royal Astronomical Society, Vol. 423, No. 3, pp. 2949–2956 en
dc.identifier.issn 0035-8711
dc.identifier.uri http://hdl.handle.net/2248/5770
dc.description Restricted Access en
dc.description.abstract Blend lines form an integral part of the theoretical analysis and modeling of the polarized spectrum of the Sun. Their interaction with other spectral lines needs to be explored and understood before we can properly use the main spectral lines to diagnose the Sun. They are known to cause a decrease in the polarization in the wings of the main line on which they superpose, or in the polarization of the continuum, when they are assumed to be formed either under the local thermodynamic equilibrium (LTE) conditions or when their intrinsic polarizability factor is zero. In this paper, we describe the theoretical framework to include the blend lines formed under non-LTE conditions, in the radiative transfer equation, and the numerical techniques to solve it. The properties of a blend line having an intrinsic polarization of its own and its interaction with the main line are discussed. The results of our analysis show that the influence of the blend lines on the main spectral lines, though small in the present context, is important and needs to be considered when interpreting the polarized spectral lines in the second solar spectrum. en
dc.language.iso en en
dc.publisher Wiley-Blackwell en
dc.relation.uri http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2966.2012.21108.x/abstract en
dc.rights © Wiley-Blackwell en
dc.subject Line: profiles en
dc.subject Polarization en
dc.subject Radiative transfer en
dc.subject Scattering en
dc.subject Sun: atmosphere en
dc.title Blend lines in the polarized spectrum of the Sun en
dc.type Article en

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