LM1-64: A NEWLY REPORTED LMC-PN WITH WR NUCLEUS
Session 2 -- Planetary Nebula and Supernova Remnants
Display presentation, Monday, 9:20-6:30, Pauley Room

## [2.07] LM1-64: A NEWLY REPORTED LMC-PN WITH WR NUCLEUS

M. Pe\~na, L. Olgu\'{\i}n (IAUNAM), M.T. Ruiz (U. Chile), S. Torres-Peimbert (IAUNAM)

The object LM1-64 was reported by Lindsay \& Mullan (1963, Irish Astron. J., 5, 51) as a probable PN in the LMC. Optical and UV spectra taken by us confirm that suggestion. LM1-64 is a high excitation planetary nebulae which shows evidence of having a WC central star. Broad stellar emission at $\lambda 4650$ is detected in the optical spectrum obtained with the CTIO 4m telescope, in 1989. A UV spectrum in the range from $1200 \AA$ to $2000 \AA$ was obtained with IUE in 1990. We have measured all the emission line fluxes available and determined values for the physical conditions and chemical abundances of the nebular ionized gas. The derived values are $T(OIII) = 14000K$, $\log He/H = 11.05$, $\log C/H = 9.48$, $\log O/H = 8.55$ and $\log Ne/H = 7.94$. LM1-64 shows a large C enhancement in the envelope as result of the central star activity, while He, O and Ne are comparable to the average values reported for the LMC-PNe (Monk, Barlow \& Clegg, 1988, MNRAS, 234, 583). We have estimated the He II Zanstra temperature of the central star to be $\sim 80,000 K$. This temperature is much higher than the values reported for the known LMC-PNe with WR nucleus that Monk et al. have classified as W4 to W8. The only other high temperature WR nucleus in a LMC-PN is N66 which recently showed evidence of undergoing a WR episode (Torres-Peimbert, Ruiz, Peimbert \& Pe\~na, 1993, IAU Symp. 155, eds. A. Acker \& R. Weinberger, in press).