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Anomalous Circular Polarization Profiles in the He I 1083.0 nm Multiplet from Solar Spicules

Bibcode
2012ApJ...759...16M
DOI
10.1088/0004-637X/759/1/16
Martínez-González, M. J.; Asensio-Ramos, A.; Manso-Sainz, R.; Beck, C.; Belluzzi, L.
Bibliographical reference

The Astrophysical Journal, Volume 759, Issue 1, article id. 16, 6pp, (2012).

Advertised on:
11
2012
Journal
The Astrophysical Journal
Number of authors
5
IAC number of authors
5
Citations
20
Refereed citations
18
Description
We report Stokes vector observations of solar spicules and a prominence in the He I 1083 nm multiplet carried out with the Tenerife Infrared Polarimeter. The observations show linear polarization profiles that are produced by scattering processes in the presence of a magnetic field. After a careful data reduction, we demonstrate the existence of extremely asymmetric Stokes V profiles in the spicular material that we are able to model with two magnetic components along the line of sight, and under the presence of atomic orientation in the energy levels that give rise to the multiplet. We discuss some possible scenarios that can generate the atomic orientation in spicules. We stress the importance of spectropolarimetric observations across the limb to distinguish such signals from observational artifacts.
Related projects
Project Image
Solar and Stellar Magnetism

Magnetic fields are at the base of star formation and stellar structure and evolution. When stars are born, magnetic fields brake the rotation during the collapse of the mollecular cloud. In the end of the life of a star, magnetic fields can play a key role in the form of the strong winds that lead to the last stages of stellar evolution. During

Tobías
Felipe García
In progress
Project Image
Magnetism, Polarization and Radiative Transfer in Astrophysics

Magnetic fields pervade all astrophysical plasmas and govern most of the variability in the Universe at intermediate time scales. They are present in stars across the whole Hertzsprung-Russell diagram, in galaxies, and even perhaps in the intergalactic medium. Polarized light provides the most reliable source of information at our disposal for the

Tanausú del
Pino Alemán
In progress
Type
Refereed
Techniques
Solar Physics (FS)

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