分子云浓核的密度和磁场

The Density and Magnetic Field in the Dense Cores of Molecular Clouds

利用均匀磁化球模型，对OrionB云中的39个分子云浓核，从它们观测的源半径和分子线线宽，推求它们的数密度和磁场．得到平均磁场110μG，平均密度为8×104／cm3．这些计算值与观测结果一致．对于R＞0．2pc的分子云浓核，利用均匀磁化球模型推求磁场和数密度的方法是一种可行的方法．

The density and magnetic field strength of the dense cores in the Orion B molecular cloud are derived from the observed radius and FWHM line width based on the model of a whforllily magnetic sphere. We obtain the average'magnetic field strength of 110μG and the average density of 8 ×104/cm3 for the 39 cores, which agree closely with the observations.The method for deriving the density and magnetic field strength is applicable to the cores of R > 0.2pc.