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The HR Del nova remnant was observed with the IFU-GMOS at Gemini North. Thespatially resolved spectral data cube was used in the kinematic, morphologicaland abundance analysis of the ejecta. The line maps show a very clumpy shellwith two main symmetric structures. The first one is the outer part of theshell seen in H-alpha, that forms two rings projected in the sky plane. Thesering structures correspond to a closed hourglass shape, first proposed byHarman and O'Brien (2003). The equatorial emission enhancement is caused by thesuperimposed hourglass structures in the line of sight. The second structureseen only in the [OIII] and [NII] maps is located along the polar directionsinside the hourglass structure. Abundances gradients between the polar caps andequatorial region were not found. However, the outer part of the shell seems tobe less abundant in Oxygen and Nitrogen than the inner regions. Detailed 2.5Dphotoionization modeling of the 3D shell was performed using the massdistribution inferred from the observations and the presence of mass clumps.The resulting model grids are used to constrain the physical properties of theshell as well as the central ionizing source. A sequence of 3D clumpy modelsincluding a disk shaped ionization source is able to reproduce the ionizationgradients between polar and equatorial regions of the shell. Differencesbetween shell axial ratios in different lines can also be explained byaspherical illumination. A total shell mass of 9 x 10-4 Msun is derived fromthese models. We estimate that 50% to 70% of the shell mass is contained inneutral clumps with density contrast up to a factor of 30.

HR Del remnant anatomy using 2-D spectral data and 3-D photoionization shell models