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Atomic Orientation in Chromospheric Lines

Published online by Cambridge University Press:  12 April 2016

J. Trujillo Bueno ,
V. Martínez Pillet ,
J. SáNchez Almeida  and
E. Landi Degl’innocenti
J. Trujillo Bueno
Affiliation:
Instituto de Astrofísica de Canarias, 38200 La Laguna, Tenerife, Spain
V. Martínez Pillet
Affiliation:
Instituto de Astrofísica de Canarias, 38200 La Laguna, Tenerife, Spain
J. SáNchez Almeida
Affiliation:
Instituto de Astrofísica de Canarias, 38200 La Laguna, Tenerife, Spain
E. Landi Degl’innocenti
Affiliation:
Dipartamento di Astronomia, Largo E. Fermi 5, 50125 Firenze, Italy

Abstract

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Observations of the Stokes I and V profiles of the Ca II H and K lines in solar magnetic regions are presented. Least-squares fits of dI/dλ to V are obtained and the wavelength variation of the residuals, i. e. V-kdI/dλ, calculated. We find significant symmetric residuals in umbrae, which are in agreement with the effect on the V profiles due to atomic orientation, i.e. with the existence of an unequal population of the Zeeman sublevels with M>0 with respect to those with M<0.

Type
Session 9. Convections and Oscillation in Active Regions
Information
International Astronomical Union Colloquium , Volume 141: The Magnetic and Velocity Fields of Solar Active Regions , 1993 , pp. 526 - 529
Copyright
Copyright © Astronomical Society of the Pacific 1993

References

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