## Detalles de publicación

PP 010075

## On the Sensitivity of Partial Redistribution Scattering Polarization Profiles to Various Atmospheric Parameters

(1) IAC; (2) IAC, Univ. La Laguna and CSIC; (3) IAC and Univ. Firenze

This paper presents a detailed study of the scattering polarization profiles

formed under partial frequency redistribution (PRD) in two thermal models of

the solar atmosphere. Particular attention is given to understanding the

influence of several atmospheric parameters on the emergent fractional linear

polarization profiles. The shapes of these $Q/I$ profiles are interpreted

in terms of the anisotropy

of the radiation field, which in turn depends on the source function

gradient that sets the angular variation of the specific intensity. We define

a suitable frequency integrated anisotropy factor for PRD that can be

directly related to the emergent linear polarization. We show that complete

frequency redistribution is a good approximation to model weak

resonance lines. We also

show that the emergent linear polarization profiles can be very sensitive to the thermal

structure of the solar atmosphere and, in particular, to spatial variations of the

damping parameter.

formed under partial frequency redistribution (PRD) in two thermal models of

the solar atmosphere. Particular attention is given to understanding the

influence of several atmospheric parameters on the emergent fractional linear

polarization profiles. The shapes of these $Q/I$ profiles are interpreted

in terms of the anisotropy

of the radiation field, which in turn depends on the source function

gradient that sets the angular variation of the specific intensity. We define

a suitable frequency integrated anisotropy factor for PRD that can be

directly related to the emergent linear polarization. We show that complete

frequency redistribution is a good approximation to model weak

resonance lines. We also

show that the emergent linear polarization profiles can be very sensitive to the thermal

structure of the solar atmosphere and, in particular, to spatial variations of the

damping parameter.