The kinematic structure of NGC 7139.

Spatio-kinematic data obtained using Taurus I on the Isaac Newton Telescope, are presented for the northern Galactic planetary nebula NGC 7139 in the emission lines 5007 and 6300 A. Additional low dispersion, long slit, spectra were also taken to obtain information on the central star and the nebular visual spectrum. A three-dimensional model geometrical structure for the nebula was deduced, from which model Taurus cubes could be derived for comparison with the data. The best fit models have been obtained with a two-component structure to describe the PN, namely an optically thick toroidal part and an optically thin (in the Lyman continuum) biconical section.