Published online by Cambridge University Press: 12 April 2016
Applying the SAC (self absorption curve) method to χ Oph (HD 148184) we conclude that Fell emission lines are optically thick. We estimate the excitation temperature of the permitted Fe II line formation region and the dimensions of this region. We conclude that this region may possibly have a non-uniform density structure.
Data obtained in CASLEO operated under agreement between the CONICET and the Universities of La Plata, Córdoba and San Juan - Argentina