S18B0091abst
S18B0091
We propose to carry out a panchromatic 3-D morpho-kinematic (3DMK) study of two planetary nebulae, representing two prototypical circumstellar wind structures, that have already been observed with Spitzer and Herschel to yield spectral mapping cube data in the mid- and far-IR. By performing slit-scan mapping in the optical using HDS and FOCAS, we will probe abundance variations in the circumstellar environments to (1) determine how the chemical abundance evolved from the initial composition of the primordial main sequence star to the present composition of the central white dwarf, and (2) understand the velocity structure of the circumstellar nebulae comprehensively, especially without degeneracy along the radial direction. We will thus obtain unique insights as to how the ISM is enriched by stellar mass loss, and constrain morpho-kinematically the possible mechanisms of stellar mass loss. HDS provides high spectral resolution to resolve the velocity structure of the nebulae, while FOCAS offers a wide spectral coverage that permits panchromatic abundance analyses and plasma diagnostics. Our successful proof-of-concept trials with Subaru Service and Gemini FT have come to fruition as a novel method to quantify the nebular abundance and mass distribution morpho-kinematically.
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