SPECTRAL-LINE RADIATION FROM SOLAR SMALL-SCALE FLUX TUBES - II

We examine spectral line radiation from small-scale magnetic flux tube s in the solar atmosphere. This is a continuation of work by Kneer et al. (1996). The main difference with the previous investigation is in the choice of the external atmosphere. Earlier we adopted an atmospher e resembling the empirical quiet Sun model for the ambient medium. In the present study, we iteratively adjust the temperature structure of the external atmosphere to fit the Stokes I and V profiles and the ave rage continuum intensities with those obtained from observations. Our models are hotter in the uppermost photospheric layers and cooler in t he deeper layers than the quiet Sun model and agree well with semi-emp irical flux tube models.