On the magnetic field of off-limb spicules

Abstract

Determining the magnetic field related to solar spicules is vital for developing adequate models of these plasma jets, which are thought to play a key role in the thermal, dynamic and magnetic structure of the Chromosphere. Here we report on the magnetic properties of off-limb spicules in a very quiet region of the solar atmosphere, as inferred from new spectropolarimetric observations in the He I 10830 A triplet obtained with the Tenerife Infrared Polarimeter. We have used a novel inversion code for Stokes profiles caused by the joint action of atomic level polarization and the Hanle and Zeeman effects (HAZEL) to interpret the observations. Magnetic fields as strong as ~40G were detected in a very localized area of the slit, which could represent a possible lower value of the field strength of organized network spicules.

Accepted for publication in ApJ, 24 pages, 5 Figures

References in corpus (4)

• A Tale Of Two Spicules: The Impact of Spicules on the Magnetic Chromosphere
• Advanced Forward Modeling and Inversion of Stokes Profiles Resulting from the Joint Action of the Hanle and Zeeman Effects
• The influence of coronal EUV irradiance on the emission in the He I 10830 A and D3 multiplets
• Influence of atomic polarization and horizontal illumination on the Stokes profiles of the He I 10830 multiplet

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