Three‐Dimensional Photoionization Structure and Distances of Planetary Nebulae. II. Menzel 1

We present the results of a spatio-kinematic study of the planetary nebulaMenzel 1 using spectro-photometric mapping and a 3-D photoionization code. Wecreate several 2-D emission line images from our long-slit spectra, and usethese to derive the line fluxes for 15 lines, the Halpha/Hbeta extinction map,and the [SII] line ratio density map of the nebula. We use our photoionizationcode constrained by these data to derive the three-dimensional nebularstructure and ionizing star parameters of Menzel 1 by simultaneously fittingthe integrated line intensities, the density map, and the observed morphologiesin several lines, as well as the velocity structure. Using theoreticalevolutionary tracks of intermediate and low mass stars, we derive a mass forthe central star of 0.63+-0.05 Msolar. We also derive a distance of 1050+_150pc to Menzel 1.Comment: To be published in ApJ of 10th February 2005. 12 figure