Multi-line Stokes inversion for prominence magnetic-field diagnostics

Abstract

We present test results on the simultaneous inversion of the Stokes profiles of the He I lines at 587.6 nm (D_3) and 1083.0 nm in prominences (90-deg scattering). We created datasets of synthetic Stokes profiles for the case of quiescent prominences (B<200 G), assuming a conservative value of 10^-3 of the peak intensity for the polarimetric sensitivity of the simulated observations. In this work, we focus on the error analysis for the inference of the magnetic field vector, under the usual assumption that the prominence can be assimilated to a slab of finite optical thickness with uniform magnetic and thermodynamic properties. We find that the simultaneous inversion of the two lines significantly reduces the errors on the inference of the magnetic field vector, with respect to the case of single-line inversion. These results provide a solid justification for current and future instrumental efforts with multi-line capabilities for the observations of solar prominences and filaments.

14 pages, 5 figures, 1 table

Cited by in corpus (17)

• Inversion of the radiative transfer equation for polarized light
• An active region filament studied simultaneously in the chromosphere and photosphere: I - Magnetic structure
• The European Solar Telescope
• The magnetic field configuration of a solar prominence inferred from spectropolarimetric observations in the He I 10830 A triplet
• Measurements of Photospheric and Chromospheric Magnetic Fields
• Instrumentation for solar spectropolarimetry: state of the art and prospects
• Vector magnetic field measurements along a cooled stereo-imaged coronal loop
• Magnetic field in atypical prominence structures: Bubble, tornado and eruption
• Observations of the Kelvin-Helmholtz instability driven by dynamic motions in a solar prominence
• Removal of Spectro-Polarimetric Fringes by 2D Pattern Recognition
• Neutral Helium Triplet Spectroscopy of Quiescent Coronal Rain with Sensitivity Estimates for Spectropolarimetric Magnetic Field Diagnostics
• Spectropolarimetric analysis of an active region filament. II. Evidence of the limitations of a single component model
• On the magnetism and dynamics of prominence legs hosting tornadoes
• Diagnosis of Magnetic and Electric Fields of Chromospheric Jets through Spectropolarimetric Observations of HI Paschen Lines
• Magnetic field vector ambiguity resolution in a quiescent prominence observed on two consecutive days
• 24 synoptic maps of average magnetic field in 296 prominences measured by the Hanle effect during the ascending phase of solar cycle 21
• Spectral Characteristics of the He I D3 Line in a Quiescent Prominence Observed by THEMIS