Some comments on the methods for measuring magnetic fields in late-type stars

Details Some comments on the methods for measuring magnetic fields in late-type stars Some comments on the methods for measuring magnetic fields in late-type stars

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...216..113l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 216, no. 1-2, June 1989, p. 113-124.

Astronomy and Astrophysics

Astrophysics

8

Late Stars, Magnetic Flux, Magnetic Stars, Stellar Magnetic Fields, Magnetic Field Configurations, Plasma Diagnostics, Stellar Activity, Stellar Atmospheres

Scientific paper

Various method for measuring magnetic field strengths and filling factors in active late-type stars are considered. The method of Saar (1988) consists of fitting analytical expressions for the intensity profiles of magnetic lines to the observed profiles. An analysis of synthetic line profiles illustrates how simplifying assumptions employed in this method affect the deduced magnetic field and filling factor values. It is pointed out that the line polarization profiles expected from a uniformly magnetized star could in principle be used as an additional diagnostic tool for the magnetic fields of late-type stars.

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