Signatures of Incomplete Paschen-Back Splitting in the Polarization Profiles of the He I 10830 multiplet

Abstract

We investigate the formation of polarization profiles induced by a magnetic field in the He I multiplet at 1083,0 nm . Our analysis considers the Zeeman splitting in the incomplete Paschen-Back regime. The effects turn out to be important and produce measurable signatures on the profiles, even for fields significantly weaker than the level-crossing field ($\sim$400 G). When compared to profiles calculated with the usual linear Zeeman effect, the incomplete Paschen-Back profiles exhibit the following conspicuous differences: a) a non-Doppler blueshift of the Stokes V zero-crossing wavelength of the blue component; b) area and peak asymmetries, even in the absence of velocity and magnetic gradients; c) a $\sim$25% reduction in the amplitude of the red component. These features do not vanish in the weak field limit. The spectral signatures that we analyze in this paper may be found in previous observations published in the literature.

arXiv commentAccepted for publication in The Astrophysical Journal

Cited by in corpus (25)

• Spectropolarimetric investigation of the propagation of magnetoacoustic waves and shock formation in sunspot atmospheres
• Advanced Forward Modeling and Inversion of Stokes Profiles Resulting from the Joint Action of the Hanle and Zeeman Effects
• Inversion of the radiative transfer equation for polarized light
• An active region filament studied simultaneously in the chromosphere and photosphere: I - Magnetic structure
• Comparing magnetic field extrapolations with measurements of magnetic loops
• On the Magnetic Field Strength of Active Region Filaments
• Wave propagation and shock formation in different magnetic structures
• Magnetic fields of an active region filament from full Stokes analysis of Si I 1082.7 nm and He I 1083.0 nm
• Measurements of Photospheric and Chromospheric Magnetic Fields
• Influence of atomic polarization and horizontal illumination on the Stokes profiles of the He I 10830 multiplet
• Multicomponent He I 10830 Å profiles in an active filament
• An active region filament studied simultaneously in the chromosphere and photosphere. II. Doppler velocities
• Spectropolarimetric observations of the Ca II 8498 A and 8542 A lines in the quiet Sun
• The 3D structure of an active region filament as extrapolated from photospheric and chromospheric observations
• Spectropolarimetric inversions of the Ca II 8498 A and 8542 A lines in the quiet Sun
• Evidence for Fine Structure in the Chromospheric Umbral Oscillation
• Magnetic structure of an activated filament in a flaring active region
• Polarimetric Calibration of Large-Aperture Telescopes I: The Beam-Expansion Method
• Recent Advances in Chromospheric and Coronal Polarization Diagnostics
• Milne-Eddington inversions of the He I 10830 Å Stokes profiles: Influence of the Paschen-Back effect
• Polynomial Approximants for the Calculation of Polarization Profiles in the \ion{He}{1} 10830 ÅMultiplet
• Magnetic sensitivity in the wing scattering polarization signals of the hydrogen Lyman-alpha line of the solar disk radiation
• Modelling the incomplete Paschen-Back effect in the spectra of magnetic Ap stars
• Partial Paschen-Back splitting of SiII and SiIII lines in magnetic CP stars
• A first look into the magnetic field configuration of prominence threads using spectropolarimetric data