五颗晚型星的磁场测定

Measurements of the Magnetic Fieldsin Five Latetype Stars

依据观测获得的５颗晚型星：λＡｎｄ，κＣｅｔ，６１ＣｙｇＡ，αＣａｓ和βＣｅｔ的高分辨率、高信噪比的光谱，采用谱线塞曼致宽的谱线轮廓叠加法和利用大量ＦｅＩ的多重线统计分析方法，成功地测定了这些星的磁场和磁场覆盖因子。

e have obtained highresolution (R=4×10~4), high signaltonoise ratio (S/N =200～300) CCD spectra of λ And,κ Cet and 61 Cyg A using the 2.16 m telescope with echelle spectrograph of Beijing Astronomical Observatory in 1995.CCD spectra of α Cas and β Cet with high resolution (R=6×10~4), and high signaltonoise ratio (S/N=300～400) were obtained using the Coud′e spectrograph of Yunnan Observatory in 1994. In this paper, the preliminary results of magnetic field determinations for five latetype stars are presented. We use two methods,i.e. the profileaddition technique of spectral profiles of Zeeman broadening and StenfloLindegren statistical analysis.