Magnetic fields and the abundance of iron at the surface of late-type dwarfs

A program package developed for implementation of the Stenflo-Lindegren method for investigation of magnetic fields with complex structure is described. It has been used to carry out magnetic field diagnostics of several G-K dwarfs. A field the order of 1 kG was detected at the surface of two of them — Eri and 61 Cyg A. The magnetic field determination for Eri is compared with previously published results. An interactive PC program developed for measurement of equivalent widths of spectral lines by various methods is also described. It was used to determine the iron abundance in the atmospheres of the stars under investigation. Comparison with data from the Fe/H] catalog of Carel de Strobel 14] indicates that our values are higher by 0.2 dex for Eri and Boo A.Translated fromAstrofizika, Vol. 39, No. 1, pp. 5–18, January–March, 1996.