Bibcode
Trujillo Bueno, J.; Martínez Pillet, V.; Sánchez Almeida, J.; Landi Degl'Innocenti, E.
Referencia bibliográfica
IAU Colloquium No. 141: The magnetic and velocity fields of solar active regions, p. 526 - 529
Fecha de publicación:
1
1993
Número de citas
7
Número de citas referidas
7
Descripción
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. The authors 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.