Poster abstract details

The Eskimo and its central star have long been known to have some remarkable peculiarities: high nebular expansion velocity, slow stellar wind, low mass loss rate, too high He II Zanstra temperature, and, in particular, great strength of N lines and weakness of C lines in the central star spectrum (Mendez 1991, IAU Symp 145, 375). Using new, high signal-to-noise CFHT ESPaDOnS visual spectrograms, and archive IUE and FUSE UV spectrograms, together with state-of-the-art non-LTE hydrodynamical model atmospheres, we will present quantitatively accurate He, C, N, O photospheric abundance determinations in the central star of NGC 2392, and compare them with the corresponding abundances in two "more normal" central stars (IC 4593, NGC 6826), which bracket NGC 2392 in surface temperature. We will explore the evolutionary implications of these abundances.