Abundances in the planetary nebula IC 5217

Citation
S. Hyung et al., Abundances in the planetary nebula IC 5217, ASTRONOM J, 122(2), 2001, pp. 954-965
Citations number
35
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMICAL JOURNAL
ISSN journal
00046256 → ACNP
Volume
122
Issue
2
Year of publication
2001
Pages
954 - 965
Database
ISI
SICI code
0004-6256(200108)122:2<954:AITPNI>2.0.ZU;2-P
Abstract
High-resolution optical wavelength spectroscopic data were secured in the o ptical wavelengths, 3700-10050 Angstrom, for the planetary nebula IC 5217 w ith the Hamilton Echelle Spectrograph at Lick Observatory. These optical sp ectra have been analyzed along with the near-UV and UV archive data. Diagno stic analyses indicate a nebular physical condition with electron temperatu re of about 10,700 K (from the [O III] lines) and the density of N-epsilon = 5000 cm(-1). Ionic concentrations have been derived with the representati ve diagnostics, and with the aid of a photoionization model construction, w e derived the elemental abundances. Contrary to the previous studies found in the literature, He and C appear to be depleted compared to the average p lanetary nebula and to the Sun (and S marginally so), while the remaining e lements appear to be close to the average value. IC 5217 may have evolved f rom an O-rich progenitor, and the central star temperature of IC 5217 is li kely to be 92,000 K.