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Stellar Zeeman Analyses: Effects of Multi-component Atmospheres

Published online by Cambridge University Press:  12 April 2016

G.W. Marcy ,
G. Basri  and
J.A. Valenti
G.W. Marcy
Affiliation:
Astronomy Department, Univ. of California, Berkeley, CA 94720, USA
G. Basri
Affiliation:
Astronomy Department, Univ. of California, Berkeley, CA 94720, USA
J.A. Valenti
Affiliation:
Astronomy Department, Univ. of California, Berkeley, CA 94720, USA

Abstract

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We simulate the radiative transfer of Zeeman-broadened lines in an active star containing both quiet and flux-tube regions. A traditional one-atmosphere Zeeman analysis of these synthetic lines yields magnetic field measurements systematically inaccurate by up to 40%. However, two atmospheric components alone cannot reproduce the observed line strengths, luminosities or photometric constancy of active stars.

Type
Part IV Stellar activity
Information
International Astronomical Union Colloquium , Volume 130: The Sun and Cool Stars: activity, magnetism, dynamos , 1991 , pp. 407 - 410
Copyright
Copyright © Springer-Verlag 1991

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