The Magnetic Field of Solar Spicules
R. Centeno (1), J. Trujillo Bueno (2, 3), A. Asensio Ramos (2) ((1), High Altitude Observatory (NCAR), Boulder, CO, (2) Instituto de Astrofisica, de Canarias, La Laguna, Spain (3) Consejo Superior de Investigaciones, Cientificas (Spain))
TL;DR
This study measures the magnetic fields of solar spicules using spectropolarimetric data and a novel inversion technique, revealing localized magnetic fields up to 40G in the chromosphere.
Contribution
It introduces a new application of the HAZEL inversion code to interpret spectropolarimetric data of solar spicules, providing direct magnetic field measurements.
Findings
Detected magnetic fields up to 40G in quiet solar regions.
First application of HAZEL to off-limb spicule observations.
Localized magnetic field measurements in the chromosphere.
Abstract
Determining the magnetic field of 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 magnetic spicule properties in a very quiet region of the off-limb solar atmosphere, as inferred from new spectropolarimetric observations in the HeI 10830 A triplet. 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 unambiguously detected in a very localized area of the slit, which may represent a possible lower value of the field strength of organized network spicules.
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