W. J. Maciel -
Abstract #48
HE2-90: A SOUTHERN PLANETARY NEBULA WITH LOW METAL ABUNDANCES
R. D. D. Costa, J. A. Freitas Pacheco, W. J. Maciel
Astron. Astrophys. 276, 184-186 (1993) Recent spectroscopic observations are presented for the southern planetary nebula He2-90. Plasma diagnostics and chemical composition are derived, showing that the object has very low abundances of O, N, S, Ne, and Ar, despite being near the galactic plane. Estimated properties of the central star suggest that this object lies at the low-luminosity region of the HR diagram.
