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Laboratory plasmas for high-energy astrophysics: A method to measure effective Landé g-factors

Published online by Cambridge University Press:  12 October 2020

Marina Giarrusso Open the ORCID record for Marina Giarrusso [Opens in a new window]
Marina Giarrusso*
Affiliation:
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud, Via S. Sofia 62, I-95123 Catania, Italy email: [email protected]
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Abstract

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Effective Landé g-factors (geff) are fundamental quantities in order to derive stellar magnetic field intensities. The determination of geff involves both total angular momenta and Landé g-factors of the transition levels. Theoretical g-factors are generally adopted, and the corresponding geff, often quite different from the one obtained in laboratory, affects the accuracy on magnetic field strength measurements. In this work we discuss a method to experimentally determine geff for highly ionised species, based on high resolution spectropolarimetry applied to Electron Cyclotron Resonance laboratory plasmas.

Keywords

atomic dataatomic processesline: profilesmagnetic fieldsplasmasinstrumentation: spectrographsinstrumentation: polarimetersmethods: laboratorytechniques: spectroscopictechniques: polarimetric
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S350: Laboratory Astrophysics: From Observations to Interpretation , April 2019 , pp. 326 - 329
Copyright
© International Astronomical Union 2020

Footnotes

† The author acknowledges the 5th Nat. Comm. of INFN supporting the grant MAPS3D.

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